The chemical U-18666A has a designated molecular formula of C25H42ClNO2 and a molecular weight of 424.066 g/mol. Synonyms may include: 3-Beta-(2-(diethylamino)ethoxy)androst-5-en-17-one, U 18,666A, U-18,666A, U 18666A, 3-beta-(2-(Diethylamino)ethoxy)androst-5-en-17-one, NSC 70801, U18666A, UNII-V0DPR5J8ZJ (ChemID). U-18666A has been assigned a MeSH pharmacological action of: Enzyme Inhibitor.