Chromatograms of endocannabinoids and N-acylethanolamine MS/MS fragmentations overlaid on each other from a representative standard mix. Reprinted with permission from: V. Kantae, S. Ogino, M. Noga, A. C. Harms, R. M. van Dongen, G. L. J. Onderwater, A. M. J. M. van den Maagdenberg, G. M. Terwindt, M. van der Stelt, M. D. Ferrari and T. Hankemeier, Journal of Lipid Research, 2017, 58, 615-624.