[Studies on chemical constituents of alpinia katsumadai].
OBJECTIVE
To study the chemical constituents from the ethanolic extract of Alpinia katsumadai Hayata.


METHODS
The compounds were separated with the column chromatographic, and their structures were identified by chemical and spectroscopic methods.


RESULTS
Eight compounds were isolated from the ethanol extract. On the basis of their physical and chemical properties and spectroscopic analysis, the structures of seven compounds were identified. They were 1,7-Diphenyl-5-hydroxy-4, 6-heptadien-3-one(I), 1,7-Diphenyl4, 6-heptadien-3-one(II), Pinocembrin (III), Cardamomin (IV), Alpinetin (V), 7,4'-Dihydroxy-5-methoxy flavanones(VI) and beta-Sitosterol(VIII), respectively.


CONCLUSIONS
Compounds I , II and VII are separated from this plant for the first time. Compounds I and II are also obtained from this genus of Alpinetin for the first time.
Wang
Xiu-Qin
XQ
Guangzhou Institute for Drug Control, Guangzhou 510160, China.
Yang
Xiao-Jiang
XJ
Li
Jiao-She
JS
D047188:Chalcones / Q000737:chemistry / Q000302:isolation & purification; D044950:Flavanones / Q000737:chemistry / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry; D012855:Sitosterols / Q000737:chemistry / Q000302:isolation & purification*; D013056:Spectrophotometry, Ultraviolet; D030521:Zingiberaceae / Q000737:chemistry*
D047188:Chalcones; D044950:Flavanones; D012855:Sitosterols; C436748:alpinetin; C025473:gamma-sitosterol; C016063:pinocembrin; C436747:cardamonin