XTren/Dienelone This product was a sports supplement that was based on the estra 4,9 dione prohormone. This hormone is a precursor to the steroid dienelone. Estra 4,9 dione is a decent mass builder and has little side effects. It doesn’t convert to estrogen nor does it convert to DHT, which means it won’t cause gyno nor hairloss in most individuals. The active steroid “dienelone” is a very potent anabolic steroid that shares many common attributes with “trenbolone” which is the 4,9,11 triene version. Despite the name “tren” contains no trenbolone and can not convert into trenbolone from any known pathway.