4-(Difluoromethyl)-2-(trifluoromethyl)pyridine-3-carboxylic acid
3-(Difluoromethyl)-5-(trifluoromethyl)pyridine-2-carboxylic acid
Methyl 2-(difluoromethyl)-5-(trifluoromethyl)pyridine-4-acetate
3-(Difluoromethyl)-4-(trifluoromethyl)pyridine-2-carboxylic acid