((4S)-2-{1-[(R)-2-Amino-2-phenylace tamido]-2-[(1R)-2-{carboxy[(4S)-4-carboxy-5,5-dimethylthiazolidin-2-yl]methylamino}-2-oxo-1-phenyl ethylamino]-2-oxoethyl}-5,5-dimethylthiazolidine-4-carboxylic acid).
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