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