{HEAD ~ The monomers} of the invention are prepared in {TAIL ~ good yield} from readily available starting materials 
are prepared in
{ HEAD ~ The monomers } of the invention are prepared in { TAIL ~ good yield } from readily available starting materials
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH