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