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