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Substance Name: Polymyxin B heptapeptide
RN: 142563-40-4


  • A potent outer membrane permeability-increasing agent.

Molecular Formula

  • C35-H59-N11-O8.x-H2-O4-S

Molecular Weight

  • 859.9979
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Names and Synonyms

Results Name

  • Polymyxin B heptapeptide

Name of Substance

  • Cyclo(diaminobutyryl-diaminobutyryl-phenylalanyl-leucyl-diaminobutyryl-diaminobutyryl-threonyl)


  • Cyclo(A2bu-A2bu-phe-leu-A2bu-A2bu-thr)
  • Cyclo(dab-dab-phe-leu-dab-dab-thr) sulfate salt
  • PBHP
  • Polymyxin B heptapeptide

Systematic Name

  • Polymyxin B1, 1-de(N2-(6-methyl-1-oxooctyl)-L-2,4-diaminobutanoic acid)-2-de-L-threonine-3-de(L-2,4-diaminobutanoic acid)-, sulfate

Registry Numbers

CAS Registry Number

  • 142563-40-4

System Generated Number

  • 0142563404

Molecular Formulas

Molecular Formula

  • C35-H59-N11-O8.x-H2-O4-S

Molecular Formula Fragments

  • C35-H59-N11-O8
  • H2-O4-S