Synonyms: butanoic acid, 2-[(methoxycarbonyl)amino]-3-methyl-, 2-[(2S,3S)-2-hydroxy-3-[[(2S)-2-[(methoxycarbonyl)amino]-3-methyl-1-oxobutyl]amino]-4-phenylbutyl]-2-[[4-(2-pyridinyl)phenyl]methyl]hydrazide, (2S)-;methyl {(5S,10S,11S,14S)-11-benzyl-10-hydroxy-15-methyl-3,6,13-trioxo-5-(propan-2-yl)-8-[4-(pyridin-2-yl)benzyl]-2-oxa-4,7,8,12-tetraazahexadecan-14-yl}carbamate