Steroidal alkaloids from the bulbs of Fritillaria monatha

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Two new Steroidal alkaloids, named pengbeisine A and pengbeisine B, were isolated from the fresh bulbs of Fritillaria monathaMigo. 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.2008 Yong Ming Luo. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
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