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