11β-PGF2α-EA is the theoretical hepatic metabolite of PGD2-EA, produced during COX-2 metabolism of the endogenous cannabinoid AEA which is found in brain, liver, and other mammalian tissues. AEA can be used directly by COX-2 and specific PG synthase to produce ethanolamide congeners of the classical PGs. PGD2-EA is formed in activated RAW 264.7 cells treated with AEA.