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