{HEAD ~ The compound} coupled to {TAIL ~ the immunogenic carrier} is utilized to produce antibodies selective for the organic compound 
coupled to
{ HEAD ~ The compound } coupled to { TAIL ~ the immunogenic carrier } is utilized to produce antibodies selective for the organic compound
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH