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Acta Cryst. (2002). E58, o506-o508 [ doi:10.1107/S1600536802006074 ]
Abstract: The crystal structure of 2-(3,4-dimethoxyphenyl)-5,7-dimethoxy-3,8-dimethyl-4H-1-benzopyran-4-one (alternatively 3',4'-dimethoxyphenyl-5,7-dimethoxy-3,8-dimethylflavone),C21H22O6, known to be a potent and selective inhibitor of rat heart cytosolic cyclic nucleotide phosphodiesterases, has been determined. In the benzopyran ring system, the pyran ring is slightly puckered. The structure is stabilized by weak C-H
O hydrogen bonds and by ![[pi]](/logos/entities/pi_rmgif.gif)
- interactions between pyran rings.
Online 12 April 2002
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