title: A new natural azulene-type pigment from Oreocnide frutescens.
abstract: A new natural red-purple azulene-type pigment, 1,1,6-trimethylazuleno[1,8-cd]pyran-3(1H)-one, named oreolactone (1), together with nine known compounds, scopoletin (2), pomolic acid (3), friedelin (4), 3β-friedelinol (5), 3α-friedelinol (6), stigmast-4-en-3-one (7), stigmast-4, 22-dien-3-one (8), β-sitosterol (9), and daucosterol (10), was isolated from the rhizomes of Oreocnide frutescens. The structures were elucidated on the basis of spectroscopic analysis.
authors.affiliation: State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, PR China.
authors.forename: Changhao
authors.initials: C
authors.lastname: Zhang
authors.forename: Hong
authors.initials: H
authors.lastname: Liang
authors.forename: Guangzhong
authors.initials: G
authors.lastname: Tu
authors.forename: Yuying
authors.initials: Y
authors.lastname: Zhao
mesh_terms: D052176:Azulenes / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D027343:Rhizome; D027003:Urticaceae / Q000737:chemistry*
chemical_list: D052176:Azulenes; D010936:Plant Extracts; C557327:oreolactone