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