Ethyl 2-amino-5-(difluoromethyl)-3-methylpyridine-6-carboxylate
Ethyl 2-amino-4-(difluoromethyl)-3-methylpyridine-6-carboxylate
Methyl 5-amino-2-(difluoromethyl)-3-methylpyridine-6-carboxylate
Methyl 6-amino-3-(difluoromethyl)-4-methylpyridine-2-acetate