title: A new naphthol from the twigs and leaves of Pterospermum yunnanense.
abstract: A new naphthol, 7-hydroxy-6-methyl-1-naphthoic acid methyl ester (1), together with eight known compounds, 6-hydroxy-7-(hydroxymethyl)-1-isopropyl-4-methyl-naphthalene (2), α-hydroxyacetosyringone (3), hexadecyl ferulate (4), scoparone (5), (+)-syringaresinol (6), stigmast-1,5-dien-3β-ol (7), β-sitosterol (8) and daucosterol (9), were isolated from the twigs and leaves of Pterospermum yunnanense Hsue. Their structures were elucidated by using spectroscopic analysis. All the compounds were isolated for the first time from P. yunnanense Hsue. Compound 1 was assessed for its cytotoxicity against five human tumour lines (HL-60, SMMC-7721, A-549, MCF-7 and SW-480), and the result showed that it has no activity.
authors.affiliation: a School of Chemistry and Chemical Engineering, Yunnan Normal University , Kunming 650500 , P.R. China.
authors.forename: Haoliang
authors.initials: H
authors.lastname: Li
authors.forename: Guoli
authors.initials: G
authors.lastname: Huang
authors.forename: Bo
authors.initials: B
authors.lastname: Liu
authors.forename: Ying
authors.initials: Y
authors.lastname: Liu
authors.forename: Rui
authors.initials: R
authors.lastname: Zhan
authors.forename: Yegao
authors.initials: Y
authors.lastname: Chen
mesh_terms: D002264:Carboxylic Acids; D006801:Humans; D019660:Malvaceae / Q000737:chemistry*; D015394:Molecular Structure; D009281:Naphthalenes; D009284:Naphthols / Q000737:chemistry / Q000302:isolation & purification*; D010936:Plant Extracts / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry; D012855:Sitosterols; D014315:Triterpenes / Q000737:chemistry
chemical_list: D002264:Carboxylic Acids; D009281:Naphthalenes; D009284:Naphthols; D010936:Plant Extracts; D012855:Sitosterols; D014315:Triterpenes; C085312:1-naphthoic acid; C025473:gamma-sitosterol
keywords: Pterospermum yunnanense; Sterculiaceae; naphthol