Suchada Chantrapromma, Hoong-Kun Fun, Sorwaporn Koysomboon, Kan Chantrapromma
2006 Acta Crystallographica Section E  
The title compound, C18H12O4, known as pinnatin, is a furanoflavone isolated from Derris indica (Lam.). The furanoflavone nucleus is almost planar. The phenyl ring is axially attached to the furanoflavone skeleton. The methoxy group deviates slightly from the plane of the molecule. The molecules are linked in a zigzag manner through C—H...O interactions into molecular ribbons along the b axis. Further stabilization is provided by weak C—H...π and π–π interactions.
doi:10.1107/s1600536806013900 fatcat:2zkr3ix7yjdwtoneqwpa65ayvi