title: 9-Meth-oxy-6a,11a-dimethyl-6a,11a-dihydro-6H-1-benzofuro[3,2-c]chromen-3-ol from Dalbergia oliveri.
abstract: The title compound, commonly known as (+)-(6aS,11aS)-medicarpin, C(16)H(14)O(4), was isolated from Dalbergia oliveri and displays a rigid mol-ecule consisting of four fused rings. The benzofuran system is inclined at an angle of 76.49 (2)° with respect to the chroman unit. The compound exists as a polymeric chain arising from inter-molecular O-H⋯O bonding.
authors.forename: Sujittra
authors.initials: S
authors.lastname: Deesamer
authors.forename: Warinthorn
authors.initials: W
authors.lastname: Chavasiri
authors.forename: Narongsak
authors.initials: N
authors.lastname: Chaichit
authors.forename: Nongnuj
authors.initials: N
authors.lastname: Muangsin
authors.forename: Udom
authors.initials: U
authors.lastname: Kokpol