The coumarins are heterocyclic compounds belonging to the class of benzopyrone enriched in various plants like tonka beans. Coumarins and their derivatives exert a vast array of bioactive properties such as anticoagulant, antibacterial, anti-inflammatory, antioxidant, antitumor, antiviral, and
A new cassane diterpene, dipteryxic acid (1), and a new isoflavonolignan, 5-methoxyxanthocercin A (2), as well as four known active compounds, isoliquiritigenin (3), 6,4'-dihydroxy-3'-methoxyaurone (4), sulfuretin (5), and (+/-)-balanophonin (6), and five known inactive compounds, butin,