I’m working on a project with chlorodehydromethyltestosterone, an anabolic androgenic steroid which is prohibited in sports at all times. On the one hand, I’m trying to synthesize long-term metabolites to extend the detection window of my substance. On the other hand, I’m doing a controlled excretion study to prove the above mentioned long-term metabolites are coming from an application of chlorodehydromethyltestosterone. This also helps to understand the human steroid metabolism. With all these data I’m hoping to contribute to the fight against doping.