{TAIL ~ The S benzothiophenium salt} 2, wherein R5 is {HEAD ~ a cyclopropyl group} 
{ TAIL ~ The S benzothiophenium salt } 2 , wherein R5 is { HEAD ~ a cyclopropyl group }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD