4-氯烟酸

6-氰基-3-吡啶羰酰氯

1-(5-Carboxy-2-pyridyl)-2-pyridon-3-carbonsaeure

3-(2-chlorophenyl)-2-methylpyrido[2,3-d]pyrimidin-4-one

2-Methyl-4H-pyrido[3,2-e][1,3]oxazin-4-one