3-(Difluoromethyl)-4-(trifluoromethyl)pyridine-2-carboxylic acid
3-(Difluoromethyl)-2-(trifluoromethyl)pyridine-4-carboxylic acid
3,4-Dibromo-2-(difluoromethyl)pyridine-6-carboxylic acid
2-(Difluoromethyl)-5-(trifluoromethyl)pyridine-3-carboxylic acid