{HEAD ~ The graft copolymer} 3 wherein {TAIL ~ the graft copolymer} is composed of 
wherein
{ HEAD ~ The graft copolymer } 3 wherein { TAIL ~ the graft copolymer } is composed of
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH