R5 is ##STR72## R9 is independently selected from {HEAD ~ the group} consisting of alkyl and {TAIL ~ arylalkyl} 
consisting of
R5 is # # STR72 # # R9 is independently selected from { HEAD ~ the group } consisting of alkyl and { TAIL ~ arylalkyl }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL