Endothelin-3, human, mouse, rabbit, rat , is a cyclic 21 amino acid peptide. It is an endogenous neuropeptide and potent vasoconstrictor.

BD-AcAc 2 (Ketone Ester), added in diet, could elevate mean blood ketone bodies of 3.5 mm and lowered plasma glucose, insulin, and leptin in animals.

EIDD-2801 is an isopropylester prodrug of the ribonucleoside analog N 4-hydroxycytidine (EIDD-1931) that has shown broad influenza virus and multiple coronaviruses activity.