and of the general formula ##STR15## in which {HEAD ~ R2} is halogen, cyano, alkyl, alkoxy or {TAIL ~ alkoxycarbonyl} and 
is
and of the general formula # # STR15 # # in which { HEAD ~ R2 } is halogen , cyano , alkyl , alkoxy or { TAIL ~ alkoxycarbonyl } and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH