1',2'-Dihydro-6'-hydroxy-4'-methyl-2'-oxo-5'-((4-(phenylazo)phenyl)azo)-1,3'-bipyridinium malate 1,3'-Bipyridinium, 1',2'-dihydro-6'-hydroxy-4'-methyl-2'-oxo-5'-((4-(phenylazo)phenyl)azo)-, salt with hydroxybutanedioic acid (1:1) 72765-55-0 EINECS 276-827-8 Pyridinium, 1-(5-(4-(phenylazo)phenylazo)-6-hydroxy-4-methyl-2-oxo-3-pyridyl)-, malate