Dihyropyrano[c]chromene and tetrahydrobenzo[b]pyran derivatives are found in many naturally occurring compounds. These heterocycles have attracted significant interest due to their widespread biological activities, including anti-diabetic,1 antimicrobial,2 antibacterial,3 anti-oxidant,4 anti-proliferative,5 anti-HIV,6 anti-tumor,7 anti-fungal, 8 and anti-cancer9 properties
