4 rezultatus
OBJECTIVE
To investigate the chemical constituents of Elephantopus mollis.
METHODS
Compounds were separated and purified by various column chromatographies including macroporous resin, ODS, Sephadex LH-20 and silica gel columns. The structures were identified by their physicochemical properties and
The ethanolic extract of Elephantopus mollis yielded three novel cytotoxic antitumor germacranolides, molephantin, molephantinin, and phantomolin. The extract also yielded three inactive known triterpenes, beta-amyrin acetate, lupeol acetate, and epifriedelanol, as well as stigmasterol. The
OBJECTIVE
To study the chemical constituents of Elephantopus tomentosus.
METHODS
The compounds were isolated by repeated HP20 macro porous adsorption resin column combined with Sephadex LH-20, ODS and silica gel chromatographies. The structures were identified on the basis of extensive spectroscopic