title: Two new coumarins from the seeds of Solanum indicum.
abstract: Two new coumarins, (E)-2-(4-hydroxy-3-methoxybenzylidene)-5-methoxy-2H-[1,4]dioxino[2,3-h]chromene-3,9-dione (indicumin E, 1) and 7-hydroxy-6,8-dimethoxy-3-(4'-hydroxy-3'-methoxyphenyl)-coumarin (2), together with two known coumarins isofraxidin (3) and fraxetin (4), were isolated from the Solanum indicum seeds. Their structures were established on the basis of 1D and 2D spectroscopic data. Compound 1 was the rarest coumarinolignoid known to date.
authors.affiliation: a Beijing University of Technology , Beijing , 100124 , China.
authors.forename: Hai-Long
authors.initials: HL
authors.lastname: Yin
authors.forename: Jie-Hui
authors.initials: JH
authors.lastname: Li
authors.forename: Bin
authors.initials: B
authors.lastname: Li
authors.forename: Li
authors.initials: L
authors.lastname: Chen
authors.forename: Jian
authors.initials: J
authors.lastname: Li
authors.forename: Ying
authors.initials: Y
authors.lastname: Tian
authors.forename: Shi-Jun
authors.initials: SJ
authors.lastname: Liu
authors.forename: Yong-Kun
authors.initials: YK
authors.lastname: Zhao
authors.forename: Yan-Hua
authors.initials: YH
authors.lastname: Xiao
authors.forename: Jun-Xing
authors.initials: JX
authors.lastname: Dong
mesh_terms: D003374:Coumarins / Q000737:chemistry / Q000302:isolation & purification*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D012639:Seeds / Q000737:chemistry; D032322:Solanum / Q000737:chemistry*
chemical_list: C587077:(E)-2-(4-hydroxy-3-methoxybenzylidene)-5-methoxy-2H-(1,4)dioxino(2,3-H)chromene-3,9-dione; C587078:7-hydroxy-6,8-dimethoxy-3-(4'-hydroxy-3'-methoxyphenyl)-coumarin; D003374:Coumarins; D004365:Drugs, Chinese Herbal; C105671:fraxetin