1,4-Benzothiazepine-2-acetic acid, 2,3,4,5-tetrahydro-5-oxo-, methyl ester 86628-23-1 BRN 4486042 Methyl 2,3,4,5-tetrahydro-4-oxo-1,5-benzothiazepine-2-acetate Methyl 2,3-dihydro-1,4-benzothiazepin-4(5H)-one-2-acetate