1,3-Naphthalenedisulfonic acid, 7-((4-((4-((2-(cyanoamino)-1,4-dihydro-6-hydroxy-4-oxo-5-pyrimidinyl)azo)benzoyl)amino)-3-methoxyphenyl)azo)-, sodium salt, compd. with 2,2',2''-nitrilotris(ethanol) 164780-86-3