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

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

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