1,4,7-Triazacyclotridecane-3,6,13-trione, 5-(2-(methylthio)ethyl)-2-(phenylmethyl)-, (2S-(2R*,5R*))- 77052-97-2 Cpmeahxa Cyclo(phe-met-epsilon-aminohexanoic acid) Cyclo(phenylalanylmethionine-epsilon-aminohexanoic acid)