6-[(2E)-3,7-Dimethylocta-2,6-dien-1-yl]-5,7-dihydroxy-8-(2-methylbutanoyl) -4-phenyl-2H-chromen-2-one-6-[(2E)-3,7-dimethylocta-2,6-dien-1-yl]-5, 7-dihydroxy-8-(3-methylbutano-l)-4-phenyl-2H-chromen-2-one (1/1) from Mesua elegans
The title co-crystal, C 30H 34O 5· C 30H 34O 5, comprises a 1:1 mixture of two mostly superimposed mol-ecules with the same chemical formula that differ in the nature of the substituent (2-methyl-butanoyl or 3-methyl-butano-yl) bound at the exocyclic ketone. The lactone ring is close to planar (r.m....