R14 is hydrogen, nitro, {TAIL ~ cyano} or {HEAD ~ C1 4 alkylcarbonyl}; and 
R14 is hydrogen , nitro , { TAIL ~ cyano } or { HEAD ~ C1 4 alkylcarbonyl } ; and
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH