title: [Flavonoids from the seeds of Alpinia galanga Willd].
abstract: Ten flavonoids were isolated from the 95% ethanol extract of the seeds of Alpinia galanga Willd. with a combination of various chromatographic techniques, including silica gel, Sephadex LH-20 and preparative HPLC. On the basis of spectroscopic data analysis, they were elucidated as (2R, 3S)-pinobaksin-3-cinnamate (1), (2R, 3R)-pinobaksin-3-cinnamate (2), pinocembrin (3), pinobaksin (4), 3-O-acetylpinobaksin (5), galangin (6), galangin-3-methylether (7), kumatakenin (8), 3-methylkaempferol (9) and (2R, 3R)-3, 5-dihydroxy-7-methoxyflavanone (10). Among them, compound 1 is a new compound, compounds 2, 5 and 10 were isolated from the genus Alpinia for the first time, and others were isolated from this plant for the first time.
authors: Meng-Qin
authors: MQ
authors: Bian
authors: Hong-Qing
authors: HQ
authors: Wang
authors: Jie
authors: J
authors: Kang
authors: Ruo-Yun
authors: RY
authors: Chen
authors: Yan-Fang
authors: YF
authors: Yang
authors: He-Zhen
authors: HZ
authors: Wu
mesh_terms: D032429:Alpinia / Q000737:chemistry*; D001578:Benzopyrans / Q000737:chemistry / Q000302:isolation & purification; D002934:Cinnamates / Q000737:chemistry / Q000302:isolation & purification*; D044950:Flavanones / Q000737:chemistry / Q000302:isolation & purification; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification; D044949:Kaempferols / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry
chemical_list: C000604360:(2R,3S)-pinobaksin-3-cinnamate; C480203:3-methylethergalangin; C464826:3-methylkaempferol; D001578:Benzopyrans; D002934:Cinnamates; D044950:Flavanones; D005419:Flavonoids; D044949:Kaempferols; C037032:galangin; C016063:pinocembrin