New Spirorotenoids from Tephrosia candida
Cesar C. Andrei
a, Paulo C. Vieira
b,*, Joa˜o B. Fernandes
b, M. Fa´tima das G. F. da Silva
band Edson Rodrigues Fo.
ba Departamento de Quı´mica, Universidade Federal de Londrina, Londrina, PR, Brazil
b Departamento de Quı´mica, Universidade Federal de Sa˜o Carlos, CP 676, 13565Ð905, Sa˜o Carlos, SP, Brazil. E-mail: paulo@dq.ufscar.br
* Author for correspondence and reprint requests
Z. Naturforsch.57 c,418Ð422 (2002); received January 22/February 18, 2002 Tephrosia candida, Fabaceae, Spirorotenoids
The ethyl acetate extract of roots ofTephrosia candidaafforded three new spirorotenoids belonging to a new class of spirocompounds, named tephrospirolactone, tephrospiroketone I, and tephrospiroketone II. The structures of these compounds were determined mainly based on spectral analysis. The only known spirorotenoid described in the literature is amor- phispironone, isolated fromAmorpha fruticosa.