英文别名Omeprazole Impurity U; rac 4-Desmethoxy-4-nitro Omeprazole; 2-[[(3,5-Dimethyl-4-nitro-2-pyridinyl)methyl]sulfinyl]-5-methoxy-1H-benzimidazole; 5-Methoxy-2-{(S)-[(4-nitro-3,5-dimethyl-pyridine-2-yl)methyl]sulfinyl}-1H-benzimidazol; 4-DesMethoxy-4-nitro OMeprazole; Esomeprazole Impurity 44; 2-[(S)-(3,5-Dimethyl-4-nitropyridin-2-yl)methylsulfinyl]-6-methoxy-1H-benzimidazole