diff --git a/src/bin/expect_tests/michelson_converter.ml b/src/bin/expect_tests/michelson_converter.ml
index 67c10ba81..81b0d9fc9 100644
--- a/src/bin/expect_tests/michelson_converter.ml
+++ b/src/bin/expect_tests/michelson_converter.ml
@@ -44,6 +44,52 @@ let%expect_test _ =
   [%expect {|
     ( ( ( 2 , +3 ) , "q" ) , true ) |}]
 
+let%expect_test _ =
+  run_ligo_good [ "dry-run" ; (contract "michelson_converter.mligo") ; "main_r" ; "test_input_pair_r" ; "s"] ;
+  [%expect {|
+    ( LIST_EMPTY() , "eqeq" ) |}] ;
+  run_ligo_good [ "compile-contract" ; (contract "michelson_converter.mligo") ; "main_r" ] ;
+  [%expect {|
+    { parameter (pair (int %one) (pair (nat %two) (pair (string %three) (bool %four)))) ;
+      storage string ;
+      code { DUP ;
+             CAR ;
+             DUP ;
+             CDR ;
+             CDR ;
+             CAR ;
+             DIG 1 ;
+             DUP ;
+             DUG 2 ;
+             CDR ;
+             CDR ;
+             CAR ;
+             CONCAT ;
+             NIL operation ;
+             PAIR ;
+             DIP { DROP 2 } } } |}];
+  run_ligo_good [ "dry-run" ; (contract "michelson_converter.mligo") ; "main_l" ; "test_input_pair_l" ; "s"] ;
+  [%expect {|
+    ( LIST_EMPTY() , "eqeq" ) |}] ;
+  run_ligo_good [ "compile-contract" ; (contract "michelson_converter.mligo") ; "main_l" ] ;
+  [%expect {|
+    { parameter (pair (pair (pair (int %one) (nat %two)) (string %three)) (bool %four)) ;
+      storage string ;
+      code { DUP ;
+             CAR ;
+             DUP ;
+             CAR ;
+             CDR ;
+             DIG 1 ;
+             DUP ;
+             DUG 2 ;
+             CAR ;
+             CDR ;
+             CONCAT ;
+             NIL operation ;
+             PAIR ;
+             DIP { DROP 2 } } } |}]
+
 let%expect_test _ =
   run_ligo_good [ "compile-contract" ; contract "michelson_comb_type_operators.mligo" ; "main_r"] ;
   [%expect {|
diff --git a/src/passes/10-transpiler/transpiler.ml b/src/passes/10-transpiler/transpiler.ml
index 4e0055b4e..1a2bec98b 100644
--- a/src/passes/10-transpiler/transpiler.ml
+++ b/src/passes/10-transpiler/transpiler.ml
@@ -230,6 +230,8 @@ let transpile_constant' : AST.constant' -> constant' = function
   | C_CREATE_CONTRACT -> C_CREATE_CONTRACT
   | C_CONVERT_TO_LEFT_COMB -> C_CONVERT_TO_LEFT_COMB
   | C_CONVERT_TO_RIGHT_COMB -> C_CONVERT_TO_RIGHT_COMB
+  | C_CONVERT_FROM_LEFT_COMB -> C_CONVERT_FROM_LEFT_COMB
+  | C_CONVERT_FROM_RIGHT_COMB -> C_CONVERT_FROM_RIGHT_COMB
 
 let rec transpile_type (t:AST.type_expression) : type_value result =
   match t.type_content with
diff --git a/src/passes/8-typer-new/todo_use_fold_generator.ml b/src/passes/8-typer-new/todo_use_fold_generator.ml
index 097426109..22346cbf1 100644
--- a/src/passes/8-typer-new/todo_use_fold_generator.ml
+++ b/src/passes/8-typer-new/todo_use_fold_generator.ml
@@ -135,3 +135,5 @@ let convert_constant' : I.constant' -> O.constant' = function
   | C_CREATE_CONTRACT -> C_CREATE_CONTRACT
   | C_CONVERT_TO_LEFT_COMB -> C_CONVERT_TO_LEFT_COMB
   | C_CONVERT_TO_RIGHT_COMB -> C_CONVERT_TO_RIGHT_COMB
+  | C_CONVERT_FROM_LEFT_COMB -> C_CONVERT_FROM_LEFT_COMB
+  | C_CONVERT_FROM_RIGHT_COMB -> C_CONVERT_FROM_RIGHT_COMB
diff --git a/src/passes/8-typer-new/untyper.ml b/src/passes/8-typer-new/untyper.ml
index 3fd9f4320..1ceeb2f52 100644
--- a/src/passes/8-typer-new/untyper.ml
+++ b/src/passes/8-typer-new/untyper.ml
@@ -137,6 +137,8 @@ let unconvert_constant' : O.constant' -> I.constant' = function
   | C_CREATE_CONTRACT -> C_CREATE_CONTRACT
   | C_CONVERT_TO_LEFT_COMB -> C_CONVERT_TO_LEFT_COMB
   | C_CONVERT_TO_RIGHT_COMB -> C_CONVERT_TO_RIGHT_COMB
+  | C_CONVERT_FROM_LEFT_COMB -> C_CONVERT_FROM_LEFT_COMB
+  | C_CONVERT_FROM_RIGHT_COMB -> C_CONVERT_FROM_RIGHT_COMB
 
 let untype_type_value (t:O.type_expression) : (I.type_expression) result =
   match t.type_meta with
diff --git a/src/passes/8-typer-old/typer.ml b/src/passes/8-typer-old/typer.ml
index 76a20edd5..de04bb9d4 100644
--- a/src/passes/8-typer-old/typer.ml
+++ b/src/passes/8-typer-old/typer.ml
@@ -360,6 +360,8 @@ let convert_constant' : I.constant' -> O.constant' = function
   | C_CREATE_CONTRACT -> C_CREATE_CONTRACT
   | C_CONVERT_TO_LEFT_COMB -> C_CONVERT_TO_LEFT_COMB
   | C_CONVERT_TO_RIGHT_COMB -> C_CONVERT_TO_RIGHT_COMB
+  | C_CONVERT_FROM_LEFT_COMB -> C_CONVERT_FROM_LEFT_COMB
+  | C_CONVERT_FROM_RIGHT_COMB -> C_CONVERT_FROM_RIGHT_COMB
 
 let unconvert_constant' : O.constant' -> I.constant' = function
   | C_INT -> C_INT
@@ -477,6 +479,8 @@ let unconvert_constant' : O.constant' -> I.constant' = function
   | C_CREATE_CONTRACT -> C_CREATE_CONTRACT
   | C_CONVERT_TO_LEFT_COMB -> C_CONVERT_TO_LEFT_COMB
   | C_CONVERT_TO_RIGHT_COMB -> C_CONVERT_TO_RIGHT_COMB
+  | C_CONVERT_FROM_LEFT_COMB -> C_CONVERT_FROM_LEFT_COMB
+  | C_CONVERT_FROM_RIGHT_COMB -> C_CONVERT_FROM_RIGHT_COMB
 
 let rec type_program (p:I.program) : (O.program * O.typer_state) result =
   let aux (e, acc:(environment * O.declaration Location.wrap list)) (d:I.declaration Location.wrap) =
diff --git a/src/passes/9-self_ast_typed/michelson_layout.ml b/src/passes/9-self_ast_typed/michelson_layout.ml
index abfd39bd7..968b2b078 100644
--- a/src/passes/9-self_ast_typed/michelson_layout.ml
+++ b/src/passes/9-self_ast_typed/michelson_layout.ml
@@ -1,62 +1,115 @@
 open Ast_typed
 open Trace
 
-let get_label_map_from_env (v:expression_variable) (env: full_environment) : expression_label_map result = 
-  let%bind a = trace_option (simple_error "corner case") @@
-    Environment.get_opt v env in
-  ( match a.definition with
-    | ED_declaration { expr = {expression_content = E_record lmap_e;_} ; _} -> ok lmap_e
-    | _ -> simple_fail "corner case" )
+let to_sorted_kv_list lmap =
+  List.sort (fun (_,{decl_position=a;_}) (_,{decl_position=b;}) -> Int.compare a b) @@
+  LMap.to_kv_list lmap
 
-let rec to_right_comb_e l new_map =
+let accessor (record:expression) (path:label) (t:type_expression) =
+  { expression_content = E_record_accessor {record; path} ;
+    location = Location.generated ;
+    type_expression = t ;
+    environment = record.environment}
+
+let rec to_left_comb' first prev l conv_map =
   match l with
-  | [] -> new_map 
-  | [ (_, expl) ; (_ , expr) ] ->
-    LMap.add_bindings [ (Label "0" , expl) ; (Label "1" , expr) ] new_map
-  | (_, exp)::tl ->
-    let new_map' = LMap.add (Label "0") exp new_map in
-    LMap.add (Label "1") ({exp with expression_content = E_record (to_right_comb_e tl new_map')}) new_map'
+  | [] -> conv_map 
+  | (label_l, {field_type=t_l}) :: (label_r, {field_type=t_r})::tl when first ->
+    let exp_l = accessor prev label_l t_l in
+    let exp_r = accessor prev label_r t_r in
+    let conv_map' = LMap.add_bindings [ (Label "0" , exp_l) ; (Label "1" , exp_r) ] LMap.empty in
+    to_left_comb' false prev tl conv_map'
+  | (label, {field_type=t})::tl ->
+    let conv_map' = LMap.add_bindings [
+        (Label "0" , {prev with expression_content = E_record conv_map});
+        (Label "1" , accessor prev label t)]
+      LMap.empty in
+    to_left_comb' first prev tl conv_map'
 
-let rec to_left_comb_e_ first l new_map =
+let to_left_comb = to_left_comb' true
+
+let rec to_right_comb
+    (prev:expression)
+    (l:(label * field_content) list)
+    (conv_map: expression label_map) : expression label_map =
   match l with
-  | [] -> new_map 
-  | (_, expl) :: (_, expr) ::tl when first ->
-    let new_map' = LMap.add_bindings [ (Label "0" , expl) ; (Label "1" , expr) ] LMap.empty in
-    to_left_comb_e_ false tl new_map'
-  | (_,exp)::tl ->
-    let new_map' = LMap.add_bindings [
-      (Label "0" , {exp with expression_content = E_record new_map});
-      (Label "1" , exp ) ;] LMap.empty in
-    to_left_comb_e_ first tl new_map'
+  | [] -> conv_map 
+  | [ (label_l,{field_type=tl}) ; (label_r,{field_type=tr}) ] ->
+    let exp_l = accessor prev label_l tl in
+    let exp_r = accessor prev label_r tr in
+    LMap.add_bindings [ (Label "0" , exp_l) ; (Label "1" , exp_r) ] conv_map
+  | (label,{field_type})::tl ->
+    let exp = { expression_content = E_record_accessor {record = prev ; path = label } ;
+                location = Location.generated ;
+                type_expression = field_type ;
+                environment = prev.environment } in
+    let conv_map' = LMap.add (Label "0") exp conv_map in
+    LMap.add (Label "1") ({exp with expression_content = E_record (to_right_comb prev tl conv_map')}) conv_map'
 
-let to_left_comb_e = to_left_comb_e_ true
+let rec from_right_comb
+    (prev:expression) 
+    (src_lmap: field_content label_map)
+    (dst_kvl:(label * field_content) list)
+    (conv_map:expression label_map) : expression label_map =
+  match dst_kvl with
+  | (label , {field_type;_}) :: (_::_ as tl) ->
+    let intermediary_type = LMap.find (Label "1") src_lmap in
+    let src_lmap' = match intermediary_type.field_type.type_content with
+      | T_record a -> a
+      | _ -> src_lmap in
+    let conv_map' = LMap.add label (accessor prev (Label "0") field_type) conv_map in
+    let next = accessor prev (Label "1") intermediary_type.field_type in
+    from_right_comb next src_lmap' tl conv_map'
+  | [(label,_)] -> LMap.add label prev conv_map
+  | [] -> conv_map
 
-let to_sorted_kv_list (l_e:expression_label_map) (l_t:te_lmap) : (label * expression) list =
-  let l = List.combine (LMap.to_kv_list l_e) (LMap.to_kv_list l_t) in
-  let sorted' = List.sort
-    (fun (_,(_,{decl_position=a;_})) (_,(_,{decl_position=b;_})) -> Int.compare a b) l in
-  List.map (fun (e,_t) -> e) sorted'
+let rec from_left_comb'
+    (prev:expression) 
+    (src_lmap: field_content label_map)
+    (dst_kvl:(label * field_content) list)
+    (conv_map:expression label_map) : expression label_map =
+  match dst_kvl with
+  | (label , {field_type;_}) :: (_::_ as tl) ->
+    let intermediary_type = LMap.find (Label "0") src_lmap in
+    let src_lmap' = match intermediary_type.field_type.type_content with
+      | T_record a -> a
+      | _ -> src_lmap in
+    let conv_map' = LMap.add label (accessor prev (Label "1") field_type) conv_map in
+    let next = accessor prev (Label "0") intermediary_type.field_type in
+    from_left_comb' next src_lmap' tl conv_map'
+  | [(label,_)] -> LMap.add label prev conv_map
+  | [] -> conv_map
 
+let from_left_comb prev src_lmap dst_kvl conv_map =
+  from_left_comb' prev src_lmap (List.rev dst_kvl) conv_map
+
+(**
+  converts pair/record of a given layout to record/pair to another
+  - foo = (a,(b,(c,d))) -> foo_converted = { a=foo.0 ; b=foo.1.0 ; c=foo.1.1.0 ; d=foo.1.1.1 }
+**)
 let peephole_expression : expression -> expression result = fun e ->
   let return expression_content = ok { e with expression_content } in
   match e.expression_content with
-  | E_constant {cons_name= (C_CONVERT_TO_RIGHT_COMB | C_CONVERT_TO_LEFT_COMB ) as converter;
-                arguments= [ {
-                  expression_content = record_exp;
-                  type_expression = {type_content = T_record lmap_t} }
-                ] } ->
-
-    let%bind lmap_e = match record_exp with
-      | E_record lmap_e -> ok lmap_e
-      | E_variable v -> get_label_map_from_env v e.environment
-      | _ -> simple_fail "corner case" in
-
-    let kvl = to_sorted_kv_list lmap_e lmap_t in 
-    let converted_exp = match converter with
-      | C_CONVERT_TO_RIGHT_COMB -> E_record (to_right_comb_e kvl LMap.empty)
-      | C_CONVERT_TO_LEFT_COMB -> E_record (to_left_comb_e kvl LMap.empty)
-      | _ -> e.expression_content
-    in
-
-    return converted_exp
-  | _ as e -> return e
\ No newline at end of file
+  | E_constant {cons_name= (C_CONVERT_TO_LEFT_COMB);
+                arguments= [ to_convert ] } ->
+    let%bind src_lmap = get_t_record to_convert.type_expression in
+    let src_kvl = to_sorted_kv_list src_lmap in
+    return @@ E_record (to_left_comb to_convert src_kvl LMap.empty)
+  | E_constant {cons_name= (C_CONVERT_TO_RIGHT_COMB);
+                arguments= [ to_convert ] } ->
+    let%bind src_lmap = get_t_record to_convert.type_expression in
+    let src_kvl = to_sorted_kv_list src_lmap in
+    return @@ E_record (to_right_comb to_convert src_kvl LMap.empty)
+  | E_constant {cons_name= (C_CONVERT_FROM_RIGHT_COMB);
+                arguments= [ to_convert ] } ->
+    let%bind dst_lmap = get_t_record e.type_expression in
+    let%bind src_lmap = get_t_record to_convert.type_expression in
+    let dst_kvl = to_sorted_kv_list dst_lmap in
+    return @@ E_record (from_right_comb to_convert src_lmap dst_kvl LMap.empty)
+  | E_constant {cons_name= (C_CONVERT_FROM_LEFT_COMB);
+                arguments= [ to_convert ] } ->
+    let%bind dst_lmap = get_t_record e.type_expression in
+    let%bind src_lmap = get_t_record to_convert.type_expression in
+    let dst_kvl = to_sorted_kv_list dst_lmap in
+    return @@ E_record (from_left_comb to_convert src_lmap dst_kvl LMap.empty)
+  | _ as e -> return e
diff --git a/src/passes/operators/helpers.ml b/src/passes/operators/helpers.ml
index a062aa36a..08c9f7b8b 100644
--- a/src/passes/operators/helpers.ml
+++ b/src/passes/operators/helpers.ml
@@ -135,6 +135,7 @@ module Typer = struct
 
   module Converter = struct
     open Ast_typed
+    open Trace
 
     let record_checks kvl =
       let%bind () = Assert.assert_true_err
@@ -167,21 +168,20 @@ module Typer = struct
         let new_map' = LMap.add (Label "0") (annotate_field field ann) new_map in
         LMap.add (Label "1") (comb (T_record (to_right_comb_t tl new_map'))) new_map'
 
-    let rec to_left_comb_t_ first l new_map =
+    let rec to_left_comb_t' first l new_map =
       match l with
       | [] -> new_map
       | (Label ann_l, field_content_l) :: (Label ann_r, field_content_r) ::tl when first ->
         let new_map' = LMap.add_bindings [
           (Label "0" , annotate_field field_content_l ann_l) ;
           (Label "1" , annotate_field field_content_r ann_r) ] LMap.empty in
-        to_left_comb_t_ false tl new_map'
+        to_left_comb_t' false tl new_map'
       | (Label ann, field)::tl ->
         let new_map' = LMap.add_bindings [
           (Label "0" , comb (T_record new_map)) ;
           (Label "1" , annotate_field field ann ) ;] LMap.empty in
-        to_left_comb_t_ first tl new_map'
-    
-    let to_left_comb_t = to_left_comb_t_ true
+        to_left_comb_t' first tl new_map'
+    let to_left_comb_t = to_left_comb_t' true
 
     let convert_type_to_right_comb l =
       let l' = List.sort (fun (_,{decl_position=a;_}) (_,{decl_position=b;_}) -> Int.compare a b) l in
@@ -190,6 +190,41 @@ module Typer = struct
     let convert_type_to_left_comb l =
       let l' = List.sort (fun (_,{decl_position=a;_}) (_,{decl_position=b;_}) -> Int.compare a b) l in
       T_record (to_left_comb_t l' LMap.empty)
+
+    let rec from_right_comb (l:field_content label_map) (size:int) : (field_content list) result =
+      let l' = List.rev @@ LMap.to_kv_list l in
+      match l' , size with
+      | [ (_,l) ; (_,r) ] , 2 -> ok [ l ; r ]
+      | [ (_,l) ; (_,{field_type=tr;_}) ], _ ->
+        let%bind comb_lmap = get_t_record tr in
+        let%bind next = from_right_comb comb_lmap (size-1) in
+        ok (l :: next)
+      | _ -> simple_fail "Could not convert michelson_right_comb pair to a record"
+
+    let rec from_left_comb (l:field_content label_map) (size:int) : (field_content list) result =
+      let l' = List.rev @@ LMap.to_kv_list l in
+      match l' , size with
+      | [ (_,l) ; (_,r) ] , 2 -> ok [ l ; r ]
+      | [ (_,{field_type=tl;_}) ; (_,r) ], _ ->
+        let%bind comb_lmap = get_t_record tl in
+        let%bind next = from_left_comb comb_lmap (size-1) in
+        ok (List.append next [r])
+      | _ -> simple_fail "Could not convert michelson_left_comb pair to a record"
+    
+    let convert_from_right_comb (src: field_content label_map) (dst: field_content label_map) : type_content result =
+      let%bind fields = from_right_comb src (LMap.cardinal dst) in
+      let labels = List.map (fun (l,_) -> l) @@
+        List.sort (fun (_,{decl_position=a;_}) (_,{decl_position=b;_}) -> Int.compare a b ) @@
+        LMap.to_kv_list dst in
+      ok @@ (T_record (LMap.of_list @@ List.combine labels fields))
+
+    let convert_from_left_comb (src: field_content label_map) (dst: field_content label_map) : type_content result =
+      let%bind fields = from_left_comb src (LMap.cardinal dst) in
+      let labels = List.map (fun (l,_) -> l) @@
+        List.sort (fun (_,{decl_position=a;_}) (_,{decl_position=b;_}) -> Int.compare a b ) @@
+        LMap.to_kv_list dst in
+      ok @@ (T_record (LMap.of_list @@ List.combine labels fields))
+
   end
 
 end
diff --git a/src/passes/operators/helpers.mli b/src/passes/operators/helpers.mli
index faba8fe85..703fe9953 100644
--- a/src/passes/operators/helpers.mli
+++ b/src/passes/operators/helpers.mli
@@ -60,6 +60,8 @@ module Typer : sig
     val record_checks : (label * field_content) list -> unit result
     val convert_type_to_right_comb : (label * field_content) list -> type_content
     val convert_type_to_left_comb : (label * field_content) list -> type_content
+    val convert_from_right_comb : field_content label_map -> field_content label_map -> type_content result
+    val convert_from_left_comb : field_content label_map -> field_content label_map -> type_content result
 
   end
 end
diff --git a/src/passes/operators/operators.ml b/src/passes/operators/operators.ml
index e49d5c498..3eb629da9 100644
--- a/src/passes/operators/operators.ml
+++ b/src/passes/operators/operators.ml
@@ -161,7 +161,8 @@ module Concrete_to_imperative = struct
 
     | "Layout.convert_to_right_comb" -> Some C_CONVERT_TO_RIGHT_COMB
     | "Layout.convert_to_left_comb" -> Some C_CONVERT_TO_LEFT_COMB
-    (* | "Layout.convert_from" -> Some C_CONVERT_FROM *)
+    | "Layout.convert_from_right_comb" -> Some C_CONVERT_FROM_RIGHT_COMB
+    | "Layout.convert_from_left_comb" -> Some C_CONVERT_FROM_LEFT_COMB
 
     | _ -> None
 
@@ -603,7 +604,7 @@ module Typer = struct
       | C_SELF_ADDRESS        -> ok @@ t_self_address;
       | C_IMPLICIT_ACCOUNT    -> ok @@ t_implicit_account;
       | C_SET_DELEGATE        -> ok @@ t_set_delegate ;
-      | c                     -> simple_fail @@ Format.asprintf "Typer not implemented for consant %a" Ast_typed.PP.constant c
+      | c                     -> simple_fail @@ Format.asprintf "Typer not implemented for constant %a" Ast_typed.PP.constant c
   end
 
   let none = typer_0 "NONE" @@ fun tv_opt ->
@@ -1180,6 +1181,20 @@ module Typer = struct
     let%bind () = Converter.record_checks kvl in
     let pair = Converter.convert_type_to_left_comb kvl in
     ok {record with type_content = pair}
+
+  let convert_from_right_comb = typer_1_opt "CONVERT_FROM_RIGHT_COMB" @@ fun pair opt ->
+    let%bind dst_t = trace_option (simple_error "convert_from_right_comb must be annotated") opt in
+    let%bind dst_lmap = get_t_record dst_t in
+    let%bind src_lmap = get_t_record pair in
+    let%bind record = Converter.convert_from_right_comb src_lmap dst_lmap in
+    ok {pair with type_content = record}
+
+  let convert_from_left_comb = typer_1_opt "CONVERT_FROM_LEFT_COMB" @@ fun pair opt ->
+    let%bind dst_t = trace_option (simple_error "convert_from_left_comb must be annotated") opt in
+    let%bind dst_lmap = get_t_record dst_t in
+    let%bind src_lmap = get_t_record pair in
+    let%bind record = Converter.convert_from_left_comb src_lmap dst_lmap in
+    ok {pair with type_content = record}
   
   let constant_typers c : typer result = match c with
     | C_INT                 -> ok @@ int ;
@@ -1275,7 +1290,9 @@ module Typer = struct
     | C_CREATE_CONTRACT     -> ok @@ create_contract ;
     | C_CONVERT_TO_RIGHT_COMB -> ok @@ convert_to_right_comb ;
     | C_CONVERT_TO_LEFT_COMB  -> ok @@ convert_to_left_comb ;
-    | _                     -> simple_fail @@ Format.asprintf "Typer not implemented for consant %a" PP.constant c
+    | C_CONVERT_FROM_RIGHT_COMB -> ok @@ convert_from_right_comb ;
+    | C_CONVERT_FROM_LEFT_COMB  -> ok @@ convert_from_left_comb ;
+    | _                     -> simple_fail @@ Format.asprintf "Typer not implemented for constant %a" PP.constant c
 
 
 
diff --git a/src/stages/4-ast_typed/PP.ml b/src/stages/4-ast_typed/PP.ml
index 9030d05f2..23c2e3b01 100644
--- a/src/stages/4-ast_typed/PP.ml
+++ b/src/stages/4-ast_typed/PP.ml
@@ -177,6 +177,8 @@ let constant ppf : constant' -> unit = function
   | C_CREATE_CONTRACT       -> fprintf ppf "CREATE_CONTRACT"
   | C_CONVERT_TO_RIGHT_COMB -> fprintf ppf "CONVERT_TO_RIGHT_COMB"
   | C_CONVERT_TO_LEFT_COMB  -> fprintf ppf "CONVERT_TO_LEFT_COMB"
+  | C_CONVERT_FROM_RIGHT_COMB -> fprintf ppf "CONVERT_FROM_RIGHT_COMB"
+  | C_CONVERT_FROM_LEFT_COMB  -> fprintf ppf "CONVERT_FROM_LEFT_COMB"
 
 let literal ppf (l : literal) =
   match l with
diff --git a/src/stages/4-ast_typed/types.ml b/src/stages/4-ast_typed/types.ml
index 3f2871f66..c293e6dde 100644
--- a/src/stages/4-ast_typed/types.ml
+++ b/src/stages/4-ast_typed/types.ml
@@ -257,6 +257,8 @@ and constant' =
   | C_CREATE_CONTRACT
   | C_CONVERT_TO_LEFT_COMB
   | C_CONVERT_TO_RIGHT_COMB
+  | C_CONVERT_FROM_LEFT_COMB
+  | C_CONVERT_FROM_RIGHT_COMB
 
 and declaration_loc = declaration location_wrap
 
diff --git a/src/stages/5-mini_c/PP.ml b/src/stages/5-mini_c/PP.ml
index dd9aaae79..b06a312fd 100644
--- a/src/stages/5-mini_c/PP.ml
+++ b/src/stages/5-mini_c/PP.ml
@@ -250,6 +250,8 @@ and constant ppf : constant' -> unit = function
   | C_CREATE_CONTRACT       -> fprintf ppf "CREATE_CONTRACT"
   | C_CONVERT_TO_RIGHT_COMB -> fprintf ppf "CONVERT_TO_RIGHT_COMB"
   | C_CONVERT_TO_LEFT_COMB  -> fprintf ppf "CONVERT_TO_LEFT_COMB"
+  | C_CONVERT_FROM_RIGHT_COMB -> fprintf ppf "CONVERT_FROM_RIGHT_COMB"
+  | C_CONVERT_FROM_LEFT_COMB  -> fprintf ppf "CONVERT_FROM_LEFT_COMB"
 
 let%expect_test _ =
   Format.printf "%a" value (D_bytes (Bytes.of_string "foo")) ;
diff --git a/src/stages/common/PP.ml b/src/stages/common/PP.ml
index 700d62576..b35efeb8f 100644
--- a/src/stages/common/PP.ml
+++ b/src/stages/common/PP.ml
@@ -127,6 +127,8 @@ let constant ppf : constant' -> unit = function
   | C_CREATE_CONTRACT       -> fprintf ppf "CREATE_CONTRACT"
   | C_CONVERT_TO_RIGHT_COMB -> fprintf ppf "CONVERT_TO_RIGHT_COMB"
   | C_CONVERT_TO_LEFT_COMB  -> fprintf ppf "CONVERT_TO_LEFT_COMB"
+  | C_CONVERT_FROM_RIGHT_COMB -> fprintf ppf "CONVERT_FROM_RIGHT_COMB"
+  | C_CONVERT_FROM_LEFT_COMB  -> fprintf ppf "CONVERT_FROM_LEFT_COMB"
 
 let literal ppf (l : literal) =
   match l with
diff --git a/src/stages/common/types.ml b/src/stages/common/types.ml
index 10788b140..a91566f69 100644
--- a/src/stages/common/types.ml
+++ b/src/stages/common/types.ml
@@ -306,3 +306,5 @@ and constant' =
   | C_CREATE_CONTRACT
   | C_CONVERT_TO_LEFT_COMB
   | C_CONVERT_TO_RIGHT_COMB
+  | C_CONVERT_FROM_LEFT_COMB
+  | C_CONVERT_FROM_RIGHT_COMB
diff --git a/src/test/contracts/michelson_converter.mligo b/src/test/contracts/michelson_converter.mligo
index ea9aaa93d..064de13f9 100644
--- a/src/test/contracts/michelson_converter.mligo
+++ b/src/test/contracts/michelson_converter.mligo
@@ -1,11 +1,29 @@
 type t3 = { foo : int ; bar : nat ;  baz : string}
-let v3 = { foo = 2 ; bar = 3n ; baz = "q" }
-
 type t4 = { one: int ; two : nat ; three : string ; four : bool}
-let v4 = { one = 2 ; two = 3n ; three = "q" ; four = true }
 
+
+(*convert to*)
+
+let v3 = { foo = 2 ; bar = 3n ; baz = "q" }
 let r3 = Layout.convert_to_right_comb (v3:t3)
+let v4 = { one = 2 ; two = 3n ; three = "q" ; four = true }
 let r4 = Layout.convert_to_right_comb (v4:t4)
 
 let l3 = Layout.convert_to_left_comb (v3:t3)
-let l4 = Layout.convert_to_left_comb (v4:t4)
\ No newline at end of file
+let l4 = Layout.convert_to_left_comb (v4:t4)
+
+(*convert from*)
+
+let s = "eq"
+let test_input_pair_r = (1,(2n,(s,true)))
+let test_input_pair_l = (((1,2n), s), true)
+type param_r = t4 michelson_right_comb
+type param_l = t4 michelson_left_comb
+
+let main_r (p, s : param_r * string) : (operation list * string) =
+  let r4 : t4 = Layout.convert_from_right_comb p in
+  ([] : operation list),  r4.three ^ p.1.1.0
+
+let main_l (p, s : param_l * string) : (operation list * string) =
+  let r4 : t4 = Layout.convert_from_left_comb p in
+  ([] : operation list),  r4.three ^ p.0.1
\ No newline at end of file