Arg-Ser-Ser-Cys-Phe-Gly-Gly-Arg-Met-Asp-Arg-Ile-Gly-Ala-Gln-Ser-Gly-Leu-Gly-Cys-Asn-Ser-Phe-Arg-Tyr(Disulfide bridge Cys7-Cys23 )
C₁₁₂H₁₇₅N₃₉O₃₅