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