Diltiazem EP Impurity B

(2S,3S)-2-(4-Methoxyphenyl)-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepin-3-yl acetate ;;|(2S,3S)-3-(Acetyloxy)-2,3-dihydro-2-(4-methoxyphenyl)-1,5-benzothiazepin-4(5H)-one; (2S-cis)-3-(Acetyloxy)-2,3-dihydro-2-(4-methoxyphenyl)-1,5-Benzothiazepin-4(5H)-one|Des[5-(2-dimethylamino)ethyl] Diltiazem ;