Flavonoids and Phenolic Compounds From the Parasitic Gymnosperm Parasitaxus usta Endemic to New Caledonia

Parasitaxus usta (Podocarpaceae) is the only parasitic gymnosperm and endemic to New Caledonia. In this survey, 11 flavonoids 6 phenolic compounds were isolated from aerial parts. As for flavonoids, six flavones, apigenin 7- O-glucoside (1), luteolin (2), (3), chrysoeriol (4), (5) tricetin 3′- (6), one C-glycosylflavone, orientin (7), flavonol, quercetin 3- (8), anthocyanin, cyanidin (9), two biflavones, isoginkgetin (10) agathisflavone (11) identified by UV, liquid chromatograph–mass spectra (LC-MS), acid hydrolysis, NMR and/or HPLC comparisons with authentic samples. On other hand, as 5- O- E- p-coumaroyl quinic (12), Z- (13), methyl ester (14), (15), E-caffeic O-β-glucopyranoside (16), Z-caffeic (17) LC-MS NMR. Chemical components of P reported in survey first time. Their chemical characters chemotaxonomically compared those Podocarpaceae species.