2,6-Dihydroxy-4-(trifluoromethyl)nicotinonitrile2,6-Dihydroxy-4-(trifluoromethyl)nicotinonitrile2,6-Dihydroxy-4-(trifluoromethyl)pyridine-3-carbonitrile3-氰基-2,6-二羟基-4-(三氟甲基)吡啶2,6-Dihydroxy-4-(trifluoromethyl)pyridine-3-carbonitrile, 97%3-Cyano-2,6-dihydroxy-4-(trifluoromethyl)pyridine