Omeprazole Sodium Standard

Omeprazole Sodium Salt; 5-methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridinyl)methyl]sulfinyl]-1H-benzimidazole Sodium Salt; (±)-Omeprazole Sodium Salt; 5-Methoxy-2-[[(4-methoxy-3,5-dimethylpyridin-2-yl)methyl]sulfinyl]-1H-benzimidazole Sodium Salt; Losec Sodium; Omeprazole Sodium;