{HEAD ~ Any suitable ring position} of the aryl moiety may be covalently linked to {TAIL ~ the defined chemical structure} 
{ HEAD ~ Any suitable ring position } of the aryl moiety may be covalently linked to { TAIL ~ the defined chemical structure }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL