Next, the pitch product is solvent fractionated to separate {TAIL ~ mesogens} which contain metals from {HEAD ~ the organometallic compounds} 
Next , the pitch product is solvent fractionated to separate { TAIL ~ mesogens } which contain metals from { HEAD ~ the organometallic compounds }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD