Cys-Phe-Gly-Ser-Arg-Ile-Asp-Arg-Ile-Gly-Ala-Gln-Ser-Gly-Met-Gly-Cys-Gly-Arg-Arg-Phe(Disulfide bridge: Cys1-Cys17)C93H152N34O27S3M.W.2273.