2-((9R,12R,15S)-9-benzyl-6-(hydroxy(phenyl)methyl)-12-isobutyl-2,2,14,16-tetramethyl-4,7,10,13-tetraoxo-3-oxa-5,8,11,14-tetraazaheptadecan-15-yl)oxazole-4-carboxylic acid

methyl O-benzyl-N-(N-(tert-butoxycarbonyl)-N-methyl-L-valyl)-L-serinate

methyl 2-[(1S)-1-{[(tert-butoxy)carbonyl](methyl)amino}-2-methylpropyl]-1,3-oxazole-4-carboxylate

methyl (S)-2-(2-methyl-1-(methylamino)propyl)oxazole-4-carboxylate

methyl 2-((9R,12R,15S)-9-benzyl-6-(hydroxy(phenyl)methyl)-12-isobutyl-2,2,14,16-tetramethyl-4,7,10,13-tetraoxo-3-oxa-5,8,11,14-tetraazaheptadecan-15-yl)oxazole-4-carboxylate