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Substance Name: Insulin, des-asn(21)-cys(20)-ethylamide(A)-
RN: 110613-07-5


  • C-terminal amino acid residue (asparagine) of the A chain has been removed & the resulting free carboxyl group of the cysteine residue converted into the ethylamide.

Molecular Formula

  • C257-H374-N64-O71-S6
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Names and Synonyms

Name of Substance

  • Insulin, des-asn(21)-cys(20)-ethylamide(A)-


  • 21-Des-asn-20-cys-ethylamide (A)insulin
  • 21-Des-asparaginyl-20-cysteine ethylamide (A)insulin
  • Dacea-insulin
  • Insulin, 21-deasparaginyl-20-cysteine ethylamide (A)-

Systematic Name

  • Insulin(ox), 8A-de-L-alanine-9A-de-L-serine-20A-(N-ethyl-L-cysteinamide)-21A-de-L-asparagine

Registry Numbers

CAS Registry Number

  • 110613-07-5

System Generated Number

  • 0110613075