5-methoxycarbonyl-2,6-dimethyl-4-(3-nitrophenyl)pyridine-3-carboxylic acid

2,6-二甲基-4-(3-硝基苯基)-吡啶-3,5-二羧酸二甲酯

2,6-dimethyl-5-methoxycarbonyl-4-(m-nitrophenyl)pyridine-3-carboxylic acid N-oxide