{HEAD ~ such a preferred specific compound} encompassed within {TAIL ~ this invention} is an intermediate conforming to the structure of Formula 
encompassed within
{ HEAD ~ such a preferred specific compound } encompassed within { TAIL ~ this invention } is an intermediate conforming to the structure of Formula
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH