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