Suitable reaction conditions are as those known in {HEAD ~ the art} for {TAIL ~ other cross} linking reactions 
Suitable reaction conditions are as those known in { HEAD ~ the art } for { TAIL ~ other cross } linking reactions
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH