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