A Novel Secobetulinic Acid 3,4-Lactone from Viburnum aboricolum
作者:Yuan-Ling Ku、G. Venkateswara Rao、Chung-Hsiung Chen、Chi Wu、Jih-Hwa Guh、Shoei-Sheng Lee
DOI:10.1002/hlca.200390068
日期:2003.3
Bio-assay-guided fractionation of the CHCl3-soluble extract from the leaves of Viburnumaboricolum led to the isolation of a novelsecobetulinicacid3,4-lactone, viburolide (=(6β)-4,6-dihydroxy-3,4-secolup-20(29)-ene-3,28-dioic acid3,4-lactone; 1). This is the first lupane-type compound possessing such a lactone skeleton from natural products. Its structure was elucidated by spectral analysis and