{TAIL ~ The system} may also benefit from {HEAD ~ the incorporation} of a higher than usual proportion of 2,4 isomer methylene diisocyanate  
{ TAIL ~ The system } may also benefit from { HEAD ~ the incorporation } of a higher than usual proportion of 2,4 isomer methylene diisocyanate
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH