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