A sulfoxide resulting from the oxidation of the sulfur attached to one of the phenyl groups of GW 501516. It is a urinary metabolite of GW 501516 (a failed drug candidate and gene doping agent whose use by athletes has been prohibited by the World Anti-Doping Agency), so detection of the sulfoxide in sports drugs testing can be used to prove GW 501516 doping.
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This entity has been manually annotated by the ChEBI Team.