title: Six new 2-(2-phenylethyl)chromones from Agarwood.
abstract: Six new chromones, 6-methoxy-2-[2-(3-methoxy-4-hydroxyphenyl)ethyllchromone (2), 6,8-dihydroxy-2-(2-phenylethyl)chromone (3), 6-hydroxy-2-[2-(4-hydroxyphenyl)ethyl]chromone (4), 6-hydroxy-2-[2-(2-hydroxyphenyl)ethyl]chromone (5), 7-hydroxy-2-(2-phenylethyl)chromone (6), and 6-hydroxy-7-methoxy-2-(2-phenylethyl)chromone (7) were isolated from the ether extract of agarwood in addition to a known compound, 2-(2-phenylethyl)chromone or flidersiachromone (1). Their structures were determined by spectroscopic methods including UV, IR, and NMR spectral data and comparisons with the calculated values using the hydroxyl and methoxyl substituent increments of the chromone ring.
authors.affiliation: Kyoto Pharmaceutical University, Japan. konishi@mb.kyoto-phu.ac.jp
authors.forename: Tenji
authors.initials: T
authors.lastname: Konishi
authors.forename: Takao
authors.initials: T
authors.lastname: Konoshima
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Shimada
authors.forename: Shiu
authors.initials: S
authors.lastname: Kiyosawa
mesh_terms: D002867:Chromones / Q000737:chemistry / Q000302:isolation & purification*; D010944:Plants / Q000737:chemistry*; D013057:Spectrum Analysis
chemical_list: D002867:Chromones