title: Sesterterpenoids from the marine sponge Hyrtios erectus.
abstract: Four new sesterterpenes, namely, (+)-20-formylhyrtiosal (1), (+)-16-O-acetyl-20-formylhyrtiosal (2), 12-alpha-O-acetylhyrtiolide (3), and 5,10-dihydroxyfurospinulosine-1 (4), together with seven known sesterterpenes (5-11) were isolated from the marine sponge Hyrtios erectus collected at Hainan, China. The structures were elucidated on the basis of extensive spectroscopic analysis involving mainly one- and two-dimensional NMR as well as mass spectroscopy.
authors.affiliation: State Key Laboratory of Natural and Biomimetic Drugs, Peking University, 100083, Beijing, People's Republic of China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Qiu
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Deng
authors.forename: Yuehu
authors.initials: Y
authors.lastname: Pei
authors.forename: Hongzheng
authors.initials: H
authors.lastname: Fu
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Peter
authors.initials: P
authors.lastname: Proksch
authors.forename: Wenhan
authors.initials: W
authors.lastname: Lin
mesh_terms: D000818:Animals; D002681:China; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D011161:Porifera / Q000737:chemistry*; D054830:Sesterterpenes; D013237:Stereoisomerism; D013729:Terpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D054830:Sesterterpenes; D013729:Terpenes