Abstract Two new Steroidal alkaloids, named pengbeisine A and pengbeisine B, were isolated from the fresh bulbs of Fritillaria monatha Migo. along with a known alkaloid. The structures were characterized as 22,26-imino-17, 23-oxido-5α-jerv-6-oxo-2α,3β-diol and22, 26-imino-17, 23-oxido-5α-jerv-6-oxo-2β,3α-diol on the basis of spectroscopic methods.
Received: 29 September 2007
Fund:We thank the National Natural Science Foundation of China (No.30160097) for financial support.
Yong Ming Luo E-mail address:firstname.lastname@example.org