4-[[5-(aminocarbonyl)-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridyl]azo]-6-[[4-chloro-6-(4-nonylphenoxy)-1,3,5-triazin-2-yl]amino]benzene-1,3-disulphonic acid

4-[[[5-(Aminocarbonyl)-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxopyridin]-3-yl]azo]-6-[[4-chloro-6-(4-nonylphenoxy)-1,3,5-triazin-2-yl]amino]-1,3-benzenedisulfonic acid