15-OxoEDE is produced by the oxidation of 15-HEDE. 15-oxoEDE inhibits 5-LO from RBL-1 cells with an IC50 of 55 μM, which is about 2-fold lower than 15(S)-HEDE.{951} A related oxo-eicosanoid, 5-oxoETE, is biosynthesized from 5(S)-HETE by a specific dehydrogenase and has potent inflammatory activity.{2090}