Ethyl 5-cyano-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-acetate
Ethyl 2-(aminomethyl)-4-cyano-5-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 3-cyano-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-5-acetate
Ethyl 2-(aminomethyl)-3-cyano-6-(trifluoromethoxy)pyridine-5-carboxylate