139555-60-5 Boc-cyclo(cys-ser(tbu)-asn-leu-ser(tbu)-thr(tbu)-cys)-val-leu-gly-OH Salmon calcitonin (1-10), t-butylated t-Butyloxycarbonyl-cyclo(cysteinyl-t-butylseryl-asparaginyl-leucyl-t-butylseryl-t-butylthreonyl-cysteinyl)-valyl-leucyl-glycine