title: 11-(3-Chloro-2-hydroxy-prop-oxy)-2,3,9-trimethoxy-chromeno[3,4-b]chromen-12(6H)-one.
abstract: In the title compound, C(22)H(21)ClO(8), the rotenoid core is nearly planar (r.m.s. deviation 0.114 Å), with the largest deviations from the least-squares plane being 0.286 (3) and 0.274 (2) Å. An inter-molecular O-H⋯O hydrogen bond links two mol-ecules into a centrosymmetric dimer having an R(2) (2)(18) ring motif.
authors.forename: Supranee
authors.initials: S
authors.lastname: Sangthong
authors.forename: Thapong
authors.initials: T
authors.lastname: Teerawatananond
authors.forename: Chuttree
authors.initials: C
authors.lastname: Phurut
authors.forename: Nattaya
authors.initials: N
authors.lastname: Ngamrojanavanich
authors.forename: Nongnuj
authors.initials: N
authors.lastname: Muangsin