Particularly, the carbonate, thionocarbonate, and {HEAD ~ oxalate cyclic esters} are prepared and used as {TAIL ~ monomers} or reactants to prepare useful products 
Particularly , the carbonate , thionocarbonate , and { HEAD ~ oxalate cyclic esters } are prepared and used as { TAIL ~ monomers } or reactants to prepare useful products
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH