5-Oxo-eicosatetraenoic acid
5-Oxo-eicosatetraenoic acid (i.e. 5-oxo-6E,8Z,11Z,14Z-eicosatetraenoic acid; also termed 5-oxo-ETE and 5-oxoETE) is a nonclassic eicosanoid metabolite of arachidonic acid and the most potent naturally occurring member of the 5-HETE family of cell signaling agents.
Source: Wikipedia — 5-Oxo-eicosatetraenoic acid (CC BY-SA 4.0)