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