@Article{IPB-2172, author = {Lien, T. P. and Kamperdick, C. and Schmidt, J. and Adam, G. and Sung, T. V.}, title = {{Apotirucallane triterpenoids from Luvunga sarmentosa (Rutaceae)}}, year = {2002}, pages = {747-754}, journal = {Phytochemistry}, doi = {10.1016/S0031-9422(02)00156-5}, volume = {60}, abstract = {The leaves of Luvunga sarmentosa (Bl.) Kurz. yielded eight apotirucallane triterpenoids named luvungins A–G, and 1α-acetoxyluvungin A. Characteristic of the structure are the seven-membered lactone-ring A, the α-hydroxyl or α-acetoxyl group at C-7 and an oxygen bridge in the side chain giving five-, six- or seven-membered rings, respectively. Because of a hemiacetal function at C-21, luvungin C occurred as a mixture of 21-epimers. The structures have been elucidated on the basis of MS and NMR spectral data. In addition, two known coumarins ostruthin (6-geranyl-7-hydroxycoumarin) and 8-geranyl-7-hydroxycoumarin as well as five known triterpenes friedelin, flindissone, melianone, niloticin and limonin were isolated.The leaves of Luvunga sarmentosa (Bl.) Kurz. yielded eight apotirucallane triterpenoids named luvungins A–G and 1α-acetoxyluvungin A. Characteristic for the luvungins were the seven-membered lactone-ring A, the α-hydroxyl or α-acetoxyl group at C-7 and an oxygen bridge in the side chain giving five-, six- or seven-membered rings.} }