FLAVONOID PROFILES OF NEW-ZEALAND LIBOCEDRUS AND RELATED GENERA

Flavonoids common to both Libocedrus bidwillii and L. plumosa, which were sampled throughout New Zealand, are: kaempferol and quercetin 3-rhamnoside, kaempferol and quercetin 3-rhamnoside-7-glucoside, quercetin 3-glucoside, apigenin and luteolin 7-glucoside, luteolin 7-di- (and tri)-glucosides, amentoflavone, 7-O-methylamentoflavone, 2,3-dihydroamentoflavone, and the new flavonoids, 8-hydroxyapigenin and 8-hydroxyluteolin 7-O-xylosides and 7-O-methyl-2,3-dihydroamentoflavone. Libocedrus plumosa is distinguished by the additional accumulation of myricetin 3-rhamnoside, and L. bidwillii by the presence of quercetin 3-O-α-[2-p-hydroxybenzoyl-4-O-p-coumaroylrhamnopyranoside] which was found amongst the biflavones. A chromatographic survey of some related non-New Zealand species and genera is also reported. © 1990.