{HEAD ~ A compound} of Formula I ##STR71## wherein: R1 is chosen from the group consisting of alkyl, n cycloalkyl, {TAIL ~ n NHC alkyl}, and arylalkyl, wherein n=1 3, 
{ HEAD ~ A compound } of Formula I # # STR71 # # wherein : R1 is chosen from the group consisting of alkyl , n cycloalkyl , { TAIL ~ n NHC alkyl } , and arylalkyl , wherein n=1 3 ,
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH