|Chinese Traditional & Herbal Drugs, 2013 ,44 (19) :2650-6. |
|Chemical constituents in leaves of Ostryopsis nobilis and their anti-oxidant activities[Reference: WebLink]|
|To study the chemical constituents of Ostryopsis nobilis and their anti-oxidant activities.|
METHODS AND RESULTS:
The chemical constituents were isolated and purified by various column chromatographic methods.Their structures were identified by physicochemical properties and spectral analyses. Twenty-three compounds were isolated from the 95% ethanol extract and identified as loliolide(1),maslinic acid(2),vanillic acid(3),3β-(3,4-dihydroxycinnamoyl)-erythrodiol(4),dammarenediol II 3-caffeate(5),pinoresinol(6),quercetin(7),daucosterol(8),kaempferol(9),3,5-dihydroxy-1,7-bis(4H-hydroxyphenyl) heptane(10),Alnusdiol(11),casuarinondiol(12),quercetin-3-O-α-L-arabinoside(13),isoquercetin(14),2,3-dihydroxylbenzoic acid(15),isoquercetin-6″-butyl acetate(16),isoquercetin-6″-benzoate(17),4″-trans-p-coumaroyl-kaempferol-3-O-α-L-rhamnoside(18),4″-cis-p-coumaroyl-kaempferol-3-O-α-L-rhamnoside(19),maslinic acid-28-O-β-D-glucoside(20),gallic acid(21),betulatetraol(22),and L-chiroinositol(23).
All the compounds are isolated from the plants in this genus for the first time.Diarylheptanoid compounds and other ten monomer compounds exhibit the good scavenging activities against 2,2-diphenyl-1-picryhydrazyl(DPPH),and O.nobilis extracts show moderate anti-oxidant effects.