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Zingiber montanum (J. Koenig) Link ex A. Dietr. (Zingiberaceae) is known as “Banada” in Bangladesh, and the rhizomes are frequently used in traditional medicines for the treatment of constipation, dyspepsia, flatulence, stomach bloating, and as mosquito repellant. In this study, dried rhizomes were extracted successively with 95% and 50% ethanol and the combined extract was then subjected to various column chromatographic methods to isolate one sesquiterpenoid derivative, zerumbone (1) and five kaempferol derivatives, i.e., kaempferol 3-O-methyl ether (2), kaempferol 3-O-α-rhamnopyranoside (3), kaempferol 3-O-α-(4”-O-acetyl)rhamnopyranoside (4), kaempferol 3-O-α-(3”-O-acetyl)rhamnopyranoside (5), and kaempferol 3-O-α-(3”,4”-di-O-acetyl)rhamnopyranoside (6). All compounds except 1 were isolated for the first time from the title plant.

Zerumbone and Kaempferol Derivatives from the Rhizomes of Zingiber montanum (J. Koenig) Link ex A. Dietr. from Bangladesh