Abstract
We identified a new radical scavenger, 10T024A (C15H12N2O4), from a culture of the Streptomyces sp. Spectroscopic elucidation indicated that this compound is a new phenazine derivative. 10T024A showed radical-scavenging activity with an ED50 of 125 μM. Moreover, it showed prostaglandin D2 (PGD2) and leukotriene B4 (LTB4) release suppressive activity in rat basophilic leukemia (RBL-2H3) cells, at IC50: 8 μM and 10 μM respectively.