Even without further purification, {HEAD ~ very little impurity} appears with this new intermediate, and it is sufficiently pure to directly undergo {TAIL ~ further dehydration} to Medrogestone 
Even without further purification , { HEAD ~ very little impurity } appears with this new intermediate , and it is sufficiently pure to directly undergo { TAIL ~ further dehydration } to Medrogestone
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH