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It is also banned from use in many sports, including the Olympic Games, under the World Anti-Doping Code.
It is created as a byproduct of nandrolone via the 5-alpha reductase enzyme and is on the list of substances prohibited by the World Anti-Doping Agency since it is a detectable metabolite of nandrolone which is an anabolic steroid.
Although a detection method was reportedly given to the World Anti-Doping Agency, it was unknown if this method was implemented.
In 1972 Butler created an umbrella group the Crown Commonwealth League of Rights to represent the four groups; it also served as a chapter of the World Anti-Communist League.
Both players tested positive for methylhexaneamine, a "non-specified stimulant" on the prohibited substances list of WADA.
It also ensures all sports bodies in the UK comply with the World Anti-Doping Code as set out by the World Anti-Doping Agency (WADA).