Chlorodehydromethylandrostenediol

Chlorodehydromethylandrostenediol (CDMA), also known as 4-chloro-17α-methylandrost-1,4-diene-3β,17β-diol, is a synthetic, orally active anabolic-androgenic steroid (AAS) and a 17α-alkylated derivative of 4-androstenediol that was never marketed. It was first encountered in 2005 when it was introduced as a "dietary supplement" and putative prohormone under the name Halodrol-50 by industry veteran Bruce Kneller, during his stint working with the dietary supplement company Gaspari Nutrition.

Source: Wikipedia — Chlorodehydromethylandrostenediol (CC BY-SA 4.0)