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