title: Antioxidant flavonoids from the seed of Oroxylum indicum.
abstract: Three new flavonoid glycosides (1-3) and nineteen known compounds (4-22) were isolated from the aqueous ethanolic extract of the seed of Oroxylum indicum. The structures of 1-3 were elucidated on the basis of spectroscopic analysis. Antioxidant activities of all the isolated compounds were evaluated using a DPPH and an ORAC assay. Compounds 3, 5-7, 9 and 12 exhibited potent antioxidant activity in the DPPH assay, while compounds 3-15 showed potent antioxidant capacity in the ORAC assay, and seven antioxidant flavonoids (4-6, 8, 9, 11, 12) were detected as the main ingredients in the methanolic extract of seed of O. indicum using an HPLC analysis.
authors: Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, People's Republic of China.
authors: Ren-yi
authors: RY
authors: Yan
authors: Yang-yang
authors: YY
authors: Cao
authors: Cheng-yu
authors: CY
authors: Chen
authors: Hui-qing
authors: HQ
authors: Dai
authors: Sheng-xian
authors: SX
authors: Yu
authors: Jie-lin
authors: JL
authors: Wei
authors: Hua
authors: H
authors: Li
authors: Bin
authors: B
authors: Yang