The Antioxidative Components from Alpinia nutans

DPPH free radical scavenger components from the fruits of Alpinia rafflesiana Wall. ex. Bak. (Zingiberaceae).

The methanol extract of the dried ripe fruits of Alpinia rafflesiana was investigated for its DPPH free radical scavenger constituents. 2',3',4',6'-Tetrahydroxychalcone (7), which has never been isolated from natural sources was found to be most active as a DPPH free radical scavenger with the IC50 value of 55 microM. Other known compounds isolated from this species include 5,6-dehydrokawain (1...

Effect of Alpinia zerumbet Components on Antioxidant and Skin

Cerebrosides and a monoacylmonogalactosylglycerol from Clinacanthus nutans.

A mixture of nine cerebrosides and a monoacylmonogalactosylglycerol were separated from the leaves of Clinacanthus nutans. The structures of the cerebrosides were characterized as 1-O-beta-D-glucosides of phytosphingosines, which comprised a common long-chain base, (2S,3S,4R,8Z)-2-amino-8(Z)-octadecene-1,3,4-triol with nine 2-hydroxy fatty acids of varying chain lengths (C(16), C(18), C(20-26))...

Infraspecific Variation of Bambusa Nutans Subspecies Nutans from Six Different Sites of Central Nepal

Bambusa nutans Wallich ex Munro subspecies nutans is a valuable economic plant occurring especially on the Terai region and mid hills (Kathmandu valley) in Nepal from sea level to 1700 m. Variation plays major role to compare the populations and to select superior trees for breeding purpose. Infraspecific variation is the study of comparison between plants belonging to the same species but from...

Antimelanoma and Antityrosinase from Alpinia galangal Constituents

Two compounds, 1,7-bis(4-hydroxyphenyl)-1,4,6-heptatrien-3-one (BHPHTO) and bisdemethoxycurcumin (BDMC) they have been isolated from the rhizomes of Alpinia galangal, and the structures of both pure constituents were determined using spectroscopic analyses. The study examined the bioeffectivenesses of the two compounds on the human melanoma A2058 and showed that significantly inhibited the prol...