Synonyms: Esomeprazole Magnesium Trihydrate Imp. E (EP), Esomeprazole Imp. E (EP), Omeprazole Imp. E (EP), Omeprazole USP Related Compound E, Omeprazole USP RC E, 4-Methoxy-2-[[(RS)-(5-methoxy-1H-benzimidazol-2-yl)sulphinyl]methyl]-3,5-dimethylpyridine 1-Oxide, Omeprazole N-Oxide, Omeprazole Related Compound E, Esomeprazole Magnesium Trihydrate Impurity E, Esomeprazole Sodium Impurity E, Omeprazole Impurity E, Esomeprazole Impurity E, Esomeprazole Impurity E