{TAIL ~ The present invention} relates to a process for purifying {HEAD ~ a polar vinyl compound} such as N vinylcarboxamides 
{ TAIL ~ The present invention } relates to a process for purifying { HEAD ~ a polar vinyl compound } such as N vinylcarboxamides
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH