The polymer 8, wherein {HEAD ~ at least 25%} of {TAIL ~ the polymer} comprises residues of a compound 1 
of
The polymer 8 , wherein { HEAD ~ at least 25 % } of { TAIL ~ the polymer } comprises residues of a compound 1
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH