Abstract
Eleven substances have been isolated from the roots of Spiranthera odoratissima, two new limonoids, the known limonoid limonin, three furoquinoline alkaloids, dictamnine, g-fagarine and skimmianine, three b-indoloquinazoline alkaloids, rutaecarpine, evodiamine and 1-hydroxyrutaecarpine, the coumarin aurapten and b-sitosterol. Structure elucidation has been carried out by IR as well as 1D and 2D NMR; the new structures were also confirmed by X-ray crystallographic analyses.
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