Ethyl 3-(aminomethyl)-6-(difluoromethyl)-2-hydroxypyridine-5-acetate
2-(Difluoromethyl)-3-hydroxy-4-nitropyridine-5-sulfonamide
Ethyl 3-(aminomethyl)-2-(difluoromethyl)-4-hydroxypyridine-6-acetate
5-(Difluoromethyl)-3-hydroxy-4-nitropyridine-2-sulfonyl chloride