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