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Rabeprazole EP Impurity E Catalogue No. - VL970013 CAS No. - 102804-77-3 Molecular Formula - 102804-77-3 Molecular Weight - 301.36 IUPAC Name: - 2-[[(4-Methoxy-3-methyl-2-pyridinyl)methyl]sulfinyl]-1H-benzimidazole Synonyms - Rabeprazole 4-Methoxy Impurity / 4-Desmethoxypropoxyl-4-Methoxy Rabeprazole