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