The compound 1 wherein {HEAD ~ a member} selected from Ra, Rb Re and {TAIL ~ Rj} is: 
selected from
The compound 1 wherein { HEAD ~ a member } selected from Ra , Rb Re and { TAIL ~ Rj } is :
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH