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