739 2(S)-{2(S)-[2(R)-AMINO-3-MERCAPTO]PROPYLAMINO-3(S)-METHYL}PENTYLOXY-3-PHENYLPROPIONYLMETHIONINE SULFONE CC[C@H](C)[C@@H](CO[C@@H](Cc1ccccc1)C(=O)N[C@@H](CCS(=O)(=O)C)C(=O)O)NC[C@H](CS)N