arimistane - Androst 3,5-dien-7,17-dione 3-deoxy-7-oxo-DHEA
ATD - 1,4,6-Androstatriene-3,17-dione,
also referred to as :
3, 17-keto-etiochol-triene,
androst-1,4,6-triene-3,17-dione
so arimistane is more or less the old pes erase, while atd is the old gaspari novedex xt ... more or less I...