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