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Limonoids from Spiranthera odoratissima St. Hil

Eleven substances have been isolated from the roots of Spiranthera odoratissima, two new limonoids, the known limonoid limonin, three furoquinoline alkaloids, dictamnine, gamma-fagarine and skimmianine, three beta-indoloquinazoline alkaloids, rutaecarpine, evodiamine and 1-hydroxyrutaecarpine, the coumarin aurapten and beta-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.

Spiranthera odoratissima; Rutaceae; limonoids; alkaloids; X-ray diffraction


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