A coumarin with diverse biological activities; reduces A23187-induced release of PGE2 and LTC4 in isolated mouse peritoneal macrophages; active against S. aureus, S. epidermidis, B. subtilis, S. lutea, and V. cholera (MICs = 0.5, 0.75, 0.75, 0.75, and 0.5 mg/ml, respectively); reduces formalin-induced paw licking and biting responses in mice at 3 and 7.5 mg/kg