ent-kaurane diterpenoids from the liverwort Jungermannia atrobrunnea.
Three new rearranged ent-kaurane-type diterpenoids (1-3) and seven new ent-kaurane-type diterpenoids (4-10) have been isolated from the liverwort Jungermannia atrobrunnea. Their structures were determined by extensive spectroscopic techniques and X-ray crystallographic analysis. The absolute configurations of these compounds were clarified by CD spectroscopic studies. Compound 1 is the first example of a rearranged ent-kaurane diterpenoid possessing a peroxide bridge.
Qu
Jian-Bo
JB
Department of Natural Products Chemistry, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China.
Zhu
Rui-Liang
RL
Zhang
Yan-Li
YL
Guo
Huai-Fang
HF
Wang
Xiao-Ning
XN
Xie
Chun-Feng
CF
Yu
Wen-Tao
WT
Ji
Mei
M
Lou
Hong-Xiang
HX
D002942:Circular Dichroism; D018360:Crystallography, X-Ray; D045786:Diterpenes, Kaurane / Q000302:isolation & purification*; D035926:Hepatophyta / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D015394:Molecular Structure
D045786:Diterpenes, Kaurane