Synaptamide-d4 is labelled Synaptamide (S910000) which is an endocannabinoid-like derivative of docosahexaenoic acid with cannabinoid-independent function. It has potent synaptogenic activity and structural similarity to anandamide. Synaptamide (S910000) is subjected to hydrolysis by fatty acid amide hydrolase, and can be oxygenated to bioactive metabolites.