(3S)-3-[[(2S)-2-[[2-[[(2S)-1-[2-[[(E,2S)-2-[[(2S)-6-amino-2-[[(2R)-2-a mino-3-sulfanyl-propanoyl]amino]hexanoyl]amino]-5-(diaminomethylidenea mino)pent-3-enoyl]amino]acetyl]pyrrolidine-2-carbonyl]amino]acetyl]ami no]-3-hydroxy-propanoyl]amino]-3-[[(1S)-1-[[(1S)-1-[[(1S)-1-carbamoyl- 2-phenyl-ethyl]carbamoyl]-2-carboxy-ethyl]carbamoyl]-2-phenyl-ethyl]ca rbamoyl]propanoic acid