4-Hydroxy-3-methoxy-6-nitro-2-(trifluoromethoxy)pyridine
6-(Difluoromethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine-4-acetic acid
2-(Difluoromethyl)-6-hydroxy-4-(trifluoromethoxy)pyridine-3-acetic acid
4-Hydroxy-3-methoxy-2-nitro-6-(trifluoromethoxy)pyridine