title: ent-kaurane diterpenoids from the liverwort Jungermannia atrobrunnea.
abstract: 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.
authors.affiliation: Department of Natural Products Chemistry, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China.
authors.forename: Jian-Bo
authors.initials: JB
authors.lastname: Qu
authors.forename: Rui-Liang
authors.initials: RL
authors.lastname: Zhu
authors.forename: Yan-Li
authors.initials: YL
authors.lastname: Zhang
authors.forename: Huai-Fang
authors.initials: HF
authors.lastname: Guo
authors.forename: Xiao-Ning
authors.initials: XN
authors.lastname: Wang
authors.forename: Chun-Feng
authors.initials: CF
authors.lastname: Xie
authors.forename: Wen-Tao
authors.initials: WT
authors.lastname: Yu
authors.forename: Mei
authors.initials: M
authors.lastname: Ji
authors.forename: Hong-Xiang
authors.initials: HX
authors.lastname: Lou
mesh_terms: 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
chemical_list: D045786:Diterpenes, Kaurane