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