... Arabian Journal of Chemistry. ... This compound represents easily accessible key educts for the synthesis of heterocyclic systems, which exhibit interesting ... acid under reflux yielded the corresponding benzylidene-bis-4-hydroxythiocoumarin derivatives 12 (Merchant and Martyres ...
![6H,11H-[2]Benzopyrano[4,3-c][1]benzopyran-6,11-dione Structure](https://image.chemsrc.com/caspic/231/2288-98-4.png)
