Osajin

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Authors	LIŠKOVÁ M. MAREK Jaromír JANKOVSKÁ D. SUKUPOVÁ L. ŽEMLIČKA M. VANČO J.
Year of publication	2005
Type	Article in Periodical
Magazine / Source	Acta Crystallographica Section E: Structure Reports Online
MU Faculty or unit	Faculty of Science
Citation
Field	Organic chemistry
Keywords	crystal structure; flavonoids
Description	Osajin [systematic name: 5-hydroxy-3-(3-hydroxyphenyl)-8,8-dimethyl-6-(3-methylbut-2-enyl)-4H,8H-pyrano[2,3-h]chromen-4-one, C25H24O5, crystallizes with two independent molecules in the asymmetric unit. The benzopyranone ring system is nearly planar in both molecules and they differ significantly only in the orientation of the benzene rings, which are rotated by 56.27 (7) and 44.16 (7)deg. with respect to the benzopyranone systems. In the crystal structure, intermolecular O-H...O hydrogen bonds link the molecules into dimers.
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