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