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