(Phenylmethoxy)carbonylcysteinyl(phenylmethyl)-tyrosyl-isoleucine tert-butyl ester 52668-03-8 Bz-Cti-otbu L-Isoleucine, N-(N-(N-((phenylmethoxy)carbonyl)-S-(phenylmethyl)-L-cysteinyl)-L-tyrosyl)-, 1,1-dimethylethyl ester Z-Cys(bzl)-tyr-ile-otbu