Further, it is preferred that the crystallization from the crude polar vinyl compound be performed in {HEAD ~ the presence} of {TAIL ~ an alcohol} or a basic compound 
Further , it is preferred that the crystallization from the crude polar vinyl compound be performed in { HEAD ~ the presence } of { TAIL ~ an alcohol } or a basic compound
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH