6-Iodopyridine-3-carboxylic acid

5-甲基-2-吡啶羰酰氯(9ci)

2-chloro-5-(2-nitroethenyl)pyridine

2-氯-5-乙烯基-吡啶

1-甲基-6-氧代-1,6-二氢吡啶-3-羧酸