%A MA Yun-Vao XIONG Jiang,XU Yun-Long %T The Constituents of Siegesbeckia glabrescens %0 Journal Article %D 1998 %J Plant Diversity %R %P 1-3 %V 20 %N 02 %U {https://journal.kib.ac.cn/CN/abstract/article_31157.shtml} %8 1998-04-25 %X Three diterpenoids, compound A (1), B(2) and C (3), have been isolated together with daucosterol (4) from the ethanol extract of Siegesbeckia glabrescens. Their chemical structures have been elucidated as ent-16β,17-dihydroxykauran-19-ocid (1), siegesbeckioside (2), darutoside (3),on the basis of chemical and spectral evidences. Compounds 1 and 2 are isolated for the first time from Siegesbeckia glebrescens.