R1 is a hydrogen or halogen atom, or {TAIL ~ an aliphatic, carbocyclic, carbamoyl}, sulfamoyl, {HEAD ~ carbonamido}, sulfonamido, alkoxycarbonyl, alkyl or arylketo, alkyl or arylsulfo, sulfo, hydroxy, acyl, nitro, cyano, amino, alkoxy, alkoxyalkyl, aryloxy, aryloxyalkyl, thioalkoxy, thioalkoxyalkyl, thioaryloxy, thioaryloxyalkyl or heterocyclic group 
R1 is a hydrogen or halogen atom , or { TAIL ~ an aliphatic , carbocyclic , carbamoyl } , sulfamoyl , { HEAD ~ carbonamido } , sulfonamido , alkoxycarbonyl , alkyl or arylketo , alkyl or arylsulfo , sulfo , hydroxy , acyl , nitro , cyano , amino , alkoxy , alkoxyalkyl , aryloxy , aryloxyalkyl , thioalkoxy , thioalkoxyalkyl , thioaryloxy , thioaryloxyalkyl or heterocyclic group
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH