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-...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 and 22, 26-imino-17, 23-oxido-5α-jerv-6-oxo-2β,3α-diol on the basis of spectroscopic methods.展开更多
Two new isosteroid alkaloids, named pengbeimine A and pengbeimine C, were isolated from the fresh bulbs of FritiUaria monatha Migo. Their structures were determined by spectral methods, and were proved by X-ray diffra...Two new isosteroid alkaloids, named pengbeimine A and pengbeimine C, were isolated from the fresh bulbs of FritiUaria monatha Migo. Their structures were determined by spectral methods, and were proved by X-ray diffraction as well.展开更多
基金We thank the National Natural Science Foundation of China （No. 30160097） for financial support.
文摘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 and 22, 26-imino-17, 23-oxido-5α-jerv-6-oxo-2β,3α-diol on the basis of spectroscopic methods.
基金financially supported by the National Natural Science Foundation of China(No.30160097).
文摘Two new isosteroid alkaloids, named pengbeimine A and pengbeimine C, were isolated from the fresh bulbs of FritiUaria monatha Migo. Their structures were determined by spectral methods, and were proved by X-ray diffraction as well.
