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