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Triterpenoids with rare carbon skeletons from Salvia hydrangea : antiprotozoal activity and absolute configurations
Journal
Journal of Natural Products
Volume
74
Number
10
Pages / Article-Number
2200-5
Abstract
Salvadione C (1) and perovskone B (2), two new triterpenoids with rare carbon skeletons, were isolated from an antiplasmodial n-hexane extract of Salvia hydrangea . The absolute configuration was determined by comparison of experimental and calculated electronic circular dichroism (ECD) spectra. In vitro activity against Plasmodium falciparum K1 strain, Trypanosoma brucei rhodesiense STIB 900 strain, and cytotoxicity in rat myoblast (L6) cells were determined. Compounds 1 and 2 showed in vitro antiplasmodial activity, with IC(50) values of 1.43 and 0.18 muM and selectivity indices (SI) of 86.2 and 69.6, respectively. IC(50) values against T. brucei rhodesiense were found to be 4.33 and 15.92 muM, respectively