methyl 5-bromo-2-methoxy-6-(methylamino)pyridine-3-carboxylate

methyl 2-chloro-6-phenylpyridine-3-carboxylate

2-氨基-6-氯-3-吡啶羧酸甲酯

6-氯-2-甲氧基烟酸甲酯

2,6-二甲氧基吡啶-3-甲酸甲酯