Methyl 3-amino-5-(difluoromethyl)-4-methoxypyridine-2-carboxylate
Ethyl 2-amino-3-(difluoromethyl)-4-methoxypyridine-6-acetate
4-Amino-6-(difluoromethyl)-3-methoxypyridine-2-acetic acid
Methyl 5-amino-4-(difluoromethyl)-2-methoxypyridine-3-carboxylate