{TAIL ~ R1} is fluorine, chlorine, iodine, o bromo, m bromo, lower alkoxy, {HEAD ~ acyloxy}, nitro, hydroxy, amino, lower alkylamino, di lower alkylamino 
{ TAIL ~ R1 } is fluorine , chlorine , iodine , o bromo , m bromo , lower alkoxy , { HEAD ~ acyloxy } , nitro , hydroxy , amino , lower alkylamino , di lower alkylamino
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH