Two new spirostanol steroidal sapogenins from fermented leaves of Agave americana

Two new spirostanol sapogenins named agavegenin A and B were isolated from the fermented leaves of Agave americana L. Their structures were elucidated as (23S, 25R)-5alpha-spirostan-3beta, 6alpha, 11alpha, 23-tetraol (1) and (23S, 25S)-5alpha-spirostan-3beta, 23, 27-triol (2) by spectral methods.