Erythrityl Tetranitrate is a vasodilator with general properties similar to nitroglycerin. Like many nitrate esters, ETN acts as a vasodilator, and was the active ingredient in the original "sustained release" tablets, made in the early 50s. Ingesting ETN or prolonged skin contact can lead to absorption and what is known as a "nitro headache".
Pentaerythrityl tetracaprate is an ester found in cosmetics and beauty products because of its binding and moisturizing properties; it is also used as a viscosity increasing agent. It is a synthetic compound derived from fatty acids, according to research