Novel 1,2 dimethylene substituted {TAIL ~ cyclic esters}, their substitution products, derivatives, particularly polymers thereof, as well as {HEAD ~ methods} for preparing these compounds are provided 
Novel 1,2 dimethylene substituted { TAIL ~ cyclic esters } , their substitution products , derivatives , particularly polymers thereof , as well as { HEAD ~ methods } for preparing these compounds are provided
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH