title: [Chemical constituents from Crepis crocea].
abstract: Thirteen compounds were isolated from the ethyl acetate fraction of Crepis crocea by column chromatographies on silica gel, Sephadex LH-20 and semi-preparative HPLC. The structures were elucidated on the basis of spectral analysis as tectorone I (1), 8β- (2-methyl- 2-hydroxy-3-oxobutanoyloxy) -glucozaluzanin C (2), tectoroside (3), luteolin-7-O-glucoside (4), cosmosiin (5), esculetin (6), 3,4-dihydroxybenzaldehyde (7), trans-4-hydroxycinnamic acid (8), Caffeic acid (9), methyl p-hydroxyphenyllactate (10), ethylp- hydroxyphenyllactate (11), cis-3,4-dihydroxy-β-ionion (12). All the compounds, except for compounds 4 and 9, were isolated from this plant for the first time, and tectorone I (1) is a new natural product.
authors.forename: Yuan-yuan
authors.initials: YY
authors.lastname: Li
authors.forename: Zhao-qi
authors.initials: ZQ
authors.lastname: Peng
authors.forename: Shi-lin
authors.initials: SL
authors.lastname: He
authors.forename: Yan
authors.initials: Y
authors.lastname: Ni
authors.forename: Xu-liang
authors.initials: XL
authors.lastname: Hao
mesh_terms: D027468:Crepis / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry* / Q000302:isolation & purification; D013058:Mass Spectrometry; D015394:Molecular Structure
chemical_list: D004365:Drugs, Chinese Herbal