Omeprazole Standard

6-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridinyl)methyl]sulfinyl]-1H-benzimidazole; 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridinyl)methyl]sulfinyl]-1H-benzimidazole; (±)-Omeprazole; Antra; Gastrogard; Gastroloc; Losec; Mepral; Mopral; Omepral; Prilosec; Zoltum (USP);