Quassinoids are degraded triterpene lactones (similar to limonoids) of the Simaroubaceae plant family grouped into C-18, C-19, C-20, C-22 and C-25 types.[1] The prototypical member of the group, quassin, was first described in the 19th century from plants of the genus Quassia from which it gets its name.[2] It was isolated in 1937,[3] and its structure elucidated in 1961.[4]
^Curcino Vieira, Ivo J.; Braz-Filho, Raimundo (2006). Quassinoids: Structural Diversity, Biological Activity and Synthetic Studies. Studies in Natural Products Chemistry. Vol. 33. pp. 433–492. doi:10.1016/S1572-5995(06)80032-3. ISBN978-0-444-52717-2.
^Winckler, F. L. (1835). "Quassin I. The preparation and purification of quassin and neoquassin, with information concerning their molecular formulas". Rep. Pharm. 4: 85.