Ethyl 4-(difluoromethyl)-2-nitro-3-(trifluoromethoxy)pyridine-5-carboxylate
3-(Difluoromethyl)-2-methoxy-6-(trifluoromethoxy)pyridine-5-methanol
Ethyl 3-(difluoromethyl)-5-nitro-2-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 5-(difluoromethyl)-3-methoxy-4-(trifluoromethoxy)pyridine-2-carboxylate