title: New sesquiterpene dilactones from Mikania micrantha.
abstract: Four new sesquiterpene dilactones, mikamicranolide (1), 11 beta,13-dihydromikamicranolide (2), 3 alpha-hydroxy-11 beta,13-dihydrodeoxymikanolide (3), and 2 beta,3 beta-dihydroxy-11 beta,13-dihydrodeoxymikanolide (4), were isolated from the whole plants of Mikania micrantha. Their structures were elucidated on the basis of spectroscopic analysis. Compounds 1 and 2 possess an unusual rearranged 12,8-germacranolide sesquiterpene skeleton.
authors.affiliation: South China Institute of Botany, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China.
authors.forename: Hongjuan
authors.initials: H
authors.lastname: Huang
authors.forename: Wanhui
authors.initials: W
authors.lastname: Ye
authors.forename: Ping
authors.initials: P
authors.lastname: Wu
authors.forename: Lidong
authors.initials: L
authors.lastname: Lin
authors.forename: Xiaoyi
authors.initials: X
authors.lastname: Wei
mesh_terms: D002681:China; D007783:Lactones / Q000737:chemistry / Q000302:isolation & purification*; D035742:Mikania / Q000737:chemistry*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification*; D013237:Stereoisomerism
chemical_list: D007783:Lactones; D012717:Sesquiterpenes