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