{HEAD ~ The mole ratio} of {TAIL ~ compound} to compound may be in the range of 1:1 1:5, but preferably in the range of 1:1 1:1.5 with a view to maximizing the economy of the overall process 
{ HEAD ~ The mole ratio } of { TAIL ~ compound } to compound may be in the range of 1:1 1:5 , but preferably in the range of 1:1 1:1.5 with a view to maximizing the economy of the overall process
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH