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(2007/10/03)2(R)-[3(S)-(N-tert-butoxycarbonylamino)-2(R,S)-hydroxy-4-phenylbutyryl-amino]-3-phenylpropionic acid methyl ester
3(S)-(N-tert-butoxycarbonylamino)-2(R,S)-hydroxy-4-phenylbutyric acid
Z-Leu-OH
2(R)-[3(S)-(N-Cbz-L-leucylamino)-2(R,S)-hydroxy-4-phenylbutyryl-amino]-3-phenylpropionic acid methyl ester