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Rabeprazole EP Impurity D Catalogue No. - VL970001 CAS No. - 924663-40-1 Molecular Formula - C18H21N3O3S Molecular Weight - 359.44 IUPAC Name - 2-[[[4-(3-Methoxypropoxy)-3-methyl-1-oxido-2-pyridinyl]methyl]thio]-1H-benzimidazole Synonyms - Rabeprazole Related Compound B / Rabeprazole N-Oxide