title: [Studies on naphthoic acid esters from the roots of Rubia cordifolia L].
abstract: Four naphthoic acid esters including a new compound were isolated from the roots of Rubia cordifolia L. The new one was named as rubilactone and its structure was elucidated as 3'-carbomethoxy-4'-hydroxy-naphtho[1',2'-2,3] pyran-6-one (I) based on the physicochemical properties and spectrometric analyses (UV, IR, MS, 1HNMR and 13CNMR). The other three were 3'-carbomethoxy-4'-hydroxy-naphtho [1',2'-2,3] furan (II), dihydromollugin (III) and 3-carbomethoxy-2-(3'-hydroxy)isopentyl-1,4-naphthohydroquinone-1-O -beta-D-glucoside (IV).
authors.affiliation: Research Department of Natural Drugs, Shenyang College of Pharmacy.
authors.forename: H M
authors.initials: HM
authors.lastname: Hua
authors.forename: S X
authors.initials: SX
authors.lastname: Wang
authors.forename: L J
authors.initials: LJ
authors.lastname: Wu
authors.forename: X
authors.initials: X
authors.lastname: Li
authors.forename: T R
authors.initials: TR
authors.lastname: Zhu
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D009284:Naphthols / Q000302:isolation & purification*; D011753:Pyrones / Q000302:isolation & purification*
chemical_list: D004365:Drugs, Chinese Herbal; D009284:Naphthols; D011753:Pyrones; C077500:rubilactone