Methyl 5-(difluoromethyl)-2-methyl-3-(trifluoromethyl)pyridine-4-carboxylate
Methyl 2-(difluoromethyl)-3-methyl-4-(trifluoromethyl)pyridine-6-carboxylate
Methyl 4-(difluoromethyl)-3-methyl-5-(trifluoromethyl)pyridine-2-carboxylate
3-(Difluoromethyl)-6-methyl-2-(trifluoromethyl)pyridine-4-carboxylic acid