sodium hydrogen 5-[[2-[4-[[4-(dimethylamino)phenyl]methylene]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-4-sulphonatophenyl]sulphonyl]salicylate

5-[[2-[[4-[[4-(Dimethylamino)phenyl]methylene]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol]-1-yl]-4-(hydroxysulfonyl)phenyl]sulfonyl]-2-hydroxybenzoic acid sodium salt