N-(2-HYDROXYETHYL)HEPTADECANAMIDE (or heptadecanoyl ethanolamide) is a synthetic analog of palmitoyl ethanolamide (PEA). This analog is unlikely to be present in any natural tissue, and so can be used as an internal standard for quantitative analysis. It was shown, that heptadecanoyl ethanolamide potentiates the Ca2+ influx response to arachidonyl ethanolamide several fold in cells expressing human recombinant VR1.