H-Ser-Gly-Arg-Gly-Lys(Ac)-Gly-Gly-Lys(Ac)-Gly-Leu-Gly-Lys(Ac)-Gly-Gly-Ala-Lys(Ac)-Arg-His-Arg-Lys-Val-Leu-Arg-Asp-Asn-Gly-Ser-Gly-Ser-Lys(biotinyl)-OH Trifluoroacetate