ii) at least one monomer or macromer containing at least one free radical polymerizable group, wherein at least one of {HEAD ~ the monomers} or macromers includes {TAIL ~ an anhydride linkage} 
includes
ii ) at least one monomer or macromer containing at least one free radical polymerizable group , wherein at least one of { HEAD ~ the monomers } or macromers includes { TAIL ~ an anhydride linkage }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL