The higher molecular weight compounds are useful as {HEAD ~ intermediates} for {TAIL ~ lubricating oil additives} 
The higher molecular weight compounds are useful as { HEAD ~ intermediates } for { TAIL ~ lubricating oil additives }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL