Split and simplify the following sentence while retaining its full meaning: Docetaxel was eliminated in both the urine and faeces following cytochrome P450-mediated oxidative metabolism of the tert-butyl ester group , within seven days , the urinary and faecal excretion accounted for about 6% and 75% of the administered radioactivity , respectively .
 Simplified version:
Docetaxel was eliminated within seven days in urine and faeces , following an oxidative metabolism process linked to cytochrome P-450 of the tert-butyl ester moiety . Urinary and faecal excretion corresponded to 6% and 75% of the administered radioactivity , respectively .