6-[(2e)-3,7-Dimethylocta-2,6-Dien-1-Yl]-5,7-Dihydroxy-8-(2-Methylbutanoy L)-4-Phenyl-2h-Chromen-2-One-6-[(2e)-3,7-Dimethylocta-2,6-Dien-1-Yl]-5,7 -Dihydroxy-8-(3-Methylbutanoyl)-4-Phenyl-2h-Chromen-2-One (1/1) From Mesua Elegans

The title co-crystal, C30H34O5 center dot C30H34O5, comprises a 1:1 mixture of two mostly superimposed molecules with the same chemical formula that differ in the nature of the substituent (2-methylbutanoyl or 3-methylbutanoyl) bound at the exocyclic ketone. The lactone ring is close to planar (r.m.s. deviation = 0.058 angstrom) and the phenyl ring is twisted out of this plane [dihedral angle = 60.08 (9)degrees]. The geranyl substituent is almost normal to benzene ring to which it is connected [CC-C-ar-C-ar (ar = aromatic) torsion angle = -87.8 (2)degrees]. Intramolecular O-H center dot center dot center dot O and O-H center dot center dot center dot pi interactions are formed. In the crystal, supramolecular chains are formed along the a axis owing to C-H center dot center dot center dot O contacts, with the lactone carbonyl atom accepting two such bonds.