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