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