Onze substâncias foram isoladas das raízes de Spiranthera odoratissima: dois novos limonóides, o limonóide já conhecido limonina, três alcalóides furoquinolínicos (dictamina, γ-fagarina e esquimianina), três alcalóides β-indoloquinazolínicos (rutaecarpina, evodiamina e 1-hidroxirutaecarpina), a cumarina aurapteno e β-sitosterol. A elucidação estrutural dessas substâncias foi realizada através de técnicas espectrais como IV e RMN em uma e duas dimensões; as estruturas novas foram confirmadas por difração de raios-X.Eleven substances have been isolated from the roots of Spiranthera odoratissima, two new limonoids, the known limonoid limonin, three furoquinoline alkaloids, dictamnine, γ-fagarine and skimmianine, three β-indoloquinazoline alkaloids, rutaecarpine, evodiamine and 1-hydroxyrutaecarpine, the coumarin aurapten and β-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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