2(S)-(2(S)-(2(S)-2(R)-amino-3-mercaptopropylamino-3(S)-metylpentyl)naphthalen-1-yl-methylamino)acetylamino-4-methylsulfanylbutyric acid methy ester
2(s)-(2(s)-(2(s)-2(r)-amino-3-mercaptopropylamino-3(s)-metylpentyl)naphthalen-1-yl-methylamino)acetylamino-4-methylsulfanylbutyric acid methy ester