title: Four homoisoflavonoids isolated from traditional Chinese medicine: "gan luo xin".
abstract: Two new homoisoflavonoids, ( ± )-5,7-dihydroxy-8-methyl-3-(2',4'-dihydroxybenzyl) chroman-4-one (1) and ( ± )-5,7-dihydroxy-6,8-dimethyl-3-(2',4'-dihydroxybenzyl) chroman-4-one (2), along with two known homoisoflavonoids, 5,7-dihydroxy-6-methyl-3-(2',4'-dihydroxybenzyl)chroman-4-one (3) and disporopsin (4), were isolated from the EtOAc extract of traditional Chinese medicine--"Gan Luo Xin." Their structures were determined on the basis of spectroscopic analysis (UV, IR, HR-ESI-MS, 1D NMR, and 2D NMR).
authors.affiliation: a College of Life Science and Technology, Beijing University of Chemical Technology , Beijing 100029 , China.
authors.forename: Li-Ming
authors.initials: LM
authors.lastname: Li
authors.forename: Qi-Peng
authors.initials: QP
authors.lastname: Yuan
authors.forename: Guang
authors.initials: G
authors.lastname: Chen
mesh_terms: D002867:Chromones / Q000737:chemistry / Q000302:isolation & purification; D007529:Isoflavones / Q000737:chemistry / Q000302:isolation & purification*; D008516:Medicine, Chinese Traditional; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular
chemical_list: C516031:(3-(2',4'-dihydroxy-benzyl)-5,7-dihydroxy-chroman-4-one); D002867:Chromones; D007529:Isoflavones
keywords: Gan Luo Xin; anti-hepatitis B; homoisoflavonoids