<unk>  (abbreviated and nicknamed as 1-Testo, 1-T), also known as δ1-dihydrotestosterone (δ1-DHT), as well as dihydroboldenone, is a synthetic anabolic–androgenic steroid (AAS) and a 5α-reduced derivative of boldenone <unk> . It differs from<unk>  by having a 1(2)-double bond instead of a 4(5)-double bond in its A ring. It was legally sold online in the United States until 2005, when it was reclassified as a Schedule III drug.
1-Testosterone
3α-Androstanediol
3β-Androstanediol
11β-Methyl-19-nortestosterone
Testosterone phenylacetate
16α-Hydroxyestrone
Dehydroepiandrosterone
19-Nor-5-androstenedione