{HEAD ~ The compound} 5 wherein {TAIL ~ X} and X1 are independently selected from the group consisting of Cl, CF3CO2, CH3CO2, CFH2CO2, 3CO, 2CO, 2CO, PhO, MeO, EtO, tosylate, mesylate, and trifluoromethanesulfonate 
wherein
{ HEAD ~ The compound } 5 wherein { TAIL ~ X } and X1 are independently selected from the group consisting of Cl , CF3CO2 , CH3CO2 , CFH2CO2 , 3CO , 2CO , 2CO , PhO , MeO , EtO , tosylate , mesylate , and trifluoromethanesulfonate
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH