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. ©2005 Sociedade Brasileira de Química.