{TAIL ~ The process} 1 in which the alkyl formate is separated by {HEAD ~ distillation} 
{ TAIL ~ The process } 1 in which the alkyl formate is separated by { HEAD ~ distillation }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD