(R)-3-<(S)-1-carboxy-3-phenylpropyl>amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-5-acetic acid

ethyl 2-((5-(2-(tert-butoxy)-2-oxoethyl)-4-oxo-2,3,4,5-tetrahydrobenzo[b][1,4]thiazepin-3-yl)amino)-4-(1-methylcyclohexyl)butanoate

tert-butyl (R)-3-<(S)-1-benzyloxycarbonyl-3-phenylpropyl>amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-5-acetate