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(2007/10/02)(S)-2-{(S)-2-[2-Amino-4-(ethoxy-methyl-phosphinoyl)-butyrylamino]-propionylamino}-propionic acid
(S)-2-{(S)-2-[2-Amino-4-(ethoxy-methyl-phosphinoyl)-butyrylamino]-propionylamino}-propionic acid
(S)-2-{(S)-2-[2-tert-Butoxycarbonylamino-4-(ethoxy-methyl-phosphinoyl)-butyrylamino]-propionylamino}-propionic acid ethyl ester
2-tert-Butoxycarbonylamino-4-(ethoxy-methyl-phosphinoyl)-butyric acid 2,4,5-trichloro-phenyl ester
(S)-2-{(S)-2-[2-tert-Butoxycarbonylamino-4-(ethoxy-methyl-phosphinoyl)-butyrylamino]-propionylamino}-propionic acid ethyl ester