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