New sesquiterpene lactone and neolignan glycosides with antioxidant and anti-inflammatory activities from the fruits of Illicium oligandrum.

Phytochemical investigations of the fruits of Illicium oligandrum resulted in a new sesquiterpene lactone, 3 beta-benzoyloxy-10-deoxyfloridanolide (1), and three new neolignan glycosides, including two dihydrobenzofuran neolignan glycosides, (7 R,8 S)-9-O-beta-D-xylopyranosyl-9'-O-alpha- L-rhamnopyranosyl-(1-->6)-beta-D-glucopyranosyldihydrodehydrodiconiferyl alcohol (2) and (7 R,8 S)-9-O-shikimoyl-4-O-beta-D-glucopyranosyldihydrodehydrodiconiferyl alcohol (3) and one 8- O-4' neolignan glycoside, (7 S,8 R)-1-[4-O-(beta-D-glucopyranosyl)-3-methoxyphenyl]-2-[4-(3-hydroxypropyl)-2,6-dimethoxyphenoxy]-1,3-propanediol (4), together with three known sesquiterpene lactones (5 - 7) and two known neolignan glycosides (8 and 9). Their structures were elucidated on the basis of 1D, 2D NMR, HR-MS and chemical evidence. Compounds 3 and 4 showed moderate antioxidant activity with the inhibitory rates 13.30% and 9.30% at 1.0 x 10(-5) M, respectively. Compounds 3 and 9 exhibited anti-inflammatory activity with the inhibitory rates 67.0% and 51.0% at 1.0 x 10(-5) M, respectively.