title: 7,7',8,8'-Tetra-meth-oxy-4,4'-dimethyl-3,3'-bicoumarin.
abstract: In the crystal structure, the title compound, C(24)H(22)O(8), lies on a twofold rotation axis and the asymmetric unit comprises one half-mol-ecule. The dihedral angle formed by the coumarin unit with the symmetry-related part is 74.78 (14)°. One of the meth-oxy groups attached to the coumarin unit is considerably twisted, making an angle of 87.17 (17)° with respect to the coumarin unit; the other is twisted by 0.66 (19)°. No classical hydrogen bonds are found in the sturcture; only a weak C-H⋯π inter-action and short intra-molecular O⋯O contacts [2.683 (2)-2.701 (2) Å] are observed.
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun
authors.forename: Samuel Robinson
authors.initials: SR
authors.lastname: Jebas
authors.forename: Mehtab
authors.initials: M
authors.lastname: Parveen
authors.forename: Zakia
authors.initials: Z
authors.lastname: Khanam
authors.forename: Raza Murad
authors.initials: RM
authors.lastname: Ghalib