5-(Aminomethyl)-3-cyano-2-(difluoromethyl)-4-methoxypyridine
6-(Aminomethyl)-4-cyano-2-(difluoromethyl)-3-methoxypyridine
4-Cyano-2-(difluoromethyl)-3-hydroxypyridine-5-sulfonyl chloride
3-Cyano-5-(difluoromethyl)-2-hydroxypyridine-4-sulfonyl chloride