4-Androstenedione, popularly known as Androstenedione or 4-AD, has many other names. The synonyms of 4-Androstenedione include 17-ketoestosterone, Andro, Androstene,Androst-4-ene-3,17-dione,4-Androstene-3,17-dione, 4-Androstenedione, Androtex, 63-05-8, 3,17-Dioxoandrost-4-ene, Fecundin,
4-AD,SKF 2170 etc. If you are not sure whether it is 4-Androstenedione, make sure that there is only one CAS number for it, and it is 63-05-8.