3-氨基-2,4-二氯吡啶

2,3-二氯-4-吡啶胺

2,4-二氯吡啶

[3,4-diacetyloxy-5-(4-hydroxy-2-oxopyridin-1-yl)oxolan-2-yl]methyl acetate

2,4,5-Tribromopyridine