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Um novo alcaloide quaternario natural, Nb-metilvoachalotina (1), tres alcaloides indolicos dimericos, conodurina (2), voacamina (3) e tabernamina (4), e os tres alcaloides monomericos 19S-heyneanina (5), coronaridina (6) e voacangina (7) foram isolados da casca das raizes de Tabernaemontana laeta. Os triterpenos conhecidos 3-O-acetil-a-amirina, 3-O-acetil-b-amirina, 3-O-acetil-lupeol e 3-O-acetiltaraxasterol e os fitoesteroides b-sitosterol e seu derivado 3-O-b-D-glicopiranosideo foram tambem identificados. As estruturas dos compostos foram elucidadas com base na analise de dados espectroscopicos.

A new natural auaternary indole slkaloid isolated from Tabernaemontana laeta Mart. (Apocynaceae)