Chromans, chromenes and Dihydrocoumarins, are important classes of benzopyran derivatives found in many natural products and synthetic molecules exhibiting unique biological and pharmacological activities. For instances, splitomicin and its analogues are known to be Sir2 inhibitors, vitamin E and trolox are well-known antioxidants and -transtocotrienoloic acid has antibacterial activity. Rhododaurichromanic acid-A shows potent anti-HIV activity and siccanin possesses strong antifungal activity. In... Mehr