2,5-difluoro-6-(4-methylphenyl)sulfanylpyridine-3-carboxamide

2-氯-5-氟烟腈

2,6-二氯-5-氟吡啶-3-羧酸乙酯

2,6-二氯-5-氟代烟酰氯

3-氰基-2,5,6-三氟吡啶