The covalently cross linked {HEAD ~ amine homopolymer} 1, having {TAIL ~ the chemical formula} 
having
The covalently cross linked { HEAD ~ amine homopolymer } 1 , having { TAIL ~ the chemical formula }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL