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Substance Name: Insulin, des-asn(21)-cys(20)-2,2,2-trifluoroethylamide(A)-
RN: 110613-05-3


  • 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 2,2,2-trifluoroethylamide.

Molecular Formula

  • C251-H371-F3-N64-O71-S6
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Names and Synonyms

Name of Substance

  • Insulin, des-asn(21)-cys(20)-2,2,2-trifluoroethylamide(A)-


  • 21-Des-asn-20-cys-2,2,2-trifluoroethylamide(A)-insulin
  • 21-Des-asparagine-20-cysteine 2,2,2-trifluoroethylamide(A)-insulin
  • Dacta-insulin
  • Insulin, desasparaginyl(21)-cysteine(20)-2,2,2-trifluoroethylamide(A)-

Systematic Name

  • Insulin(ox), 8A-de-L-alanine-9A-de-L-serine-20A-(N-(2,2,2-trifluoroethyl)-L-cysteinamide)-21A-de-L-asparagine-

Registry Numbers

CAS Registry Number

  • 110613-05-3

System Generated Number

  • 0110613053