Flavonoids and a New Calamenene-type Sesquiterpene from Rhizomes of Alpinia oxymitra K. Schum. (Zingiberaceae)

Short Report

JOURNAL 244

Records of Natural Products

VOLUME & ISSUE

Year: 2009 Issue: 2 April-June

PAGES

p.110 - 113

STATISTICS

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AUTHORS

Kusuma Jitsaeng, Wanchai De Eknamkul and Bernd Schneider

GRAPHICAL ABSTRACT

ABSTRACT

Chemical constituents of rhizomes of Alpinia oxymitra (Zingiberaceae) were investigated. Using chromatographic techniques, two known flavonoids, epicatechin and galloepicatechin, were isolated together with a new calamenene sesquiterpene, (–)-(1R,4S)-8-hydroxy-13-calamenenoic acid. Structure elucidation of the isolated compounds was accomplished by means of spectroscopic techniques, especially NMR spectroscopy and mass spectrometry.

KEYWORDS

Alpinia oxymitra
Cenolophon oxymitrum
Zingiberaceae
flavonoids
calamenene sesquiterpene.