1,1'-bis-(4-Sulfophenyl)-3,3'-dicarboxy-5,5'-dihydroxypyrazolo-4,4'-trimethine oxonole tetra

oxonole red ; tetrasodium 4-[3-[3-carboxylato-5-hydroxy-1-(4-sulphonatophenyl)-1h-pyrazol-4-yl]allylidene]-4,5-dihydro-5-oxo-1-(4-sulphonatophenyl)-1h-pyrazole-3-carboxylate ; 1,1'-bis(4-sulfophenyl)-3,3'-dicarboxy-5,5'-dihydroxypyrazolo-4,4'-trimethine oxonole tetrasodium salt ; 4-[3-[[3-(sodiooxycarbonyl)-5-hydroxy-1-[4-(sodiosulfo)phenyl]-1h-pyrazol]-4-yl]-2-propenylidene]-4,5-dihydro-5-oxo-1-(4-sodiosulfophenyl)-1h-pyrazole-3-carboxylic acid sodium salt ; 1,1'-bis(4-sulfophenyl)-3,3'-dicarboxy-5,5'-dihydroxypyrazolo-4,4'-trimethineoxonoletetrasodiumsalt ; 4-[3-[3-carboxy-5-hydroxy-1-(4-sulfophenyl)-1h-pyrazol-4-yl]-2-propenyliden