tert-butyl 3(R)-[5-tert-butoxycarbonylamino-1(S)-carboxypentyl]amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-5-acetate 、
tert-butyl 3(R)-ethoxycarbonylmethylamino-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-5-acetate 在
盐酸 作用下,
生成 3(R)-[5-amino-1(S)-carboxypentyl]amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-5-acetic acid dihydrochloride