S-​[(1R,​2E,​4E,​6Z,​9Z)​-​12-Carboxy-​1-​[(1S,​3Z,​6Z)​-​1-​hydroxy-​3,​6-​nonadien-​1-​yl]​-​2,​4,​6,​9-​dodecatetraen-​1-​yl]​-​L-​cysteinyl-glycine is synthesized from omega-3 essential fatty acids and utilized by macrophages in molecular pathways related to tissue regeneration and inflammation.