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