5',5'''-[ethylenebis(p-phenyleneazo)]bis[1',2'-dihydro-6'-hydroxy-4'-methyl-2'-oxo-1,3'-bipyridinium] dilactate

1,3'-Bipyridinium,5',5'''-[1,2-ethanediylbis(4,1-phenyleneazo)]bis[1',2'-dihydro-6'-hydroxy-4'-methyl-2'-oxo-,salt with 2-hydroxypropanoic acid

1,3'-Bipyridinium, 5',5'''-[1,2-ethanediylbis(4,1-phenyleneazo)]bis[1',2'-dihydro-6'-hydroxy-4'-methyl-2'-oxo-, salt with 2-hydroxypropanoic acid