7,7′,8,8′-Tetramethoxy-4,4′-dimethyl-3,3′-bicoumarin

7,7′,8,8′-Tetramethoxy-4,4′-dimethyl-3,3′-bicoumarin

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In the crystal structure, caruso milk thistle the title compound, C24H22O8, lies on a twofold rotation axis and the asymmetric unit comprises one half-molecule.The dihedral angle formed by the coumarin unit with the symmetry-related part is 74.78 (14)°.

One of the methoxy 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 interaction read more and short intramolecular O.O contacts [2.

683 (2)–2.701 (2) Å] are observed.