5-甲基-3-硝基-4-氧代-1,4-二氢-2-吡啶羧酸

(4-氯-5-甲基吡啶-2-基)甲醇

2,5-dimethyl-4-methoxy-3-nitropyridine 1-oxide

methyl 1,4-dihydro-3-amino-5-methyl-4-oxo-2-pyridinecarboxylate

4-methoxy-5-methyl-3-nitro-2-pyridinemethanol