{TAIL ~ F phenylalkylene oxide acetylenes} having {HEAD ~ the formula} C6 F5 C.tbd 
{ TAIL ~ F phenylalkylene oxide acetylenes } having { HEAD ~ the formula } C6 F5 C.tbd
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH