“…The structure determination of these coumarins were elucidated based on their spectroscopic properties as well as of their chemical evidence. A variety of pharmacological activities have been reported for coumarins and their analogs, including anticoagulant, anticancer, antioxidant, antiviral, antidiabetic, anti-inflammatory, antibacterial, antifungal, antileishmanial, and antineurodegenerative activities [ 3 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. Our studies on the bioactive constituents from medicinal plants, such as Angelica furcijuga Kitagawa [ 14 , 15 , 16 , 17 ] and Mammea siamensis (Miq.)…”