220348-90-3 2,7-Naphthalenedisulfonic acid,3,4-dihydro-4-oxo-3-(phenylhydrazono)-, disodium salt
102969-63-1 2,7-Naphthalenedisulfonic acid,3-[[5-(acetylamino)-2-methoxy-4-[(1-sulfo-2-naphthalenyl)azo]phenyl]azo]-6-amino-4-hydroxy-, tripotassium salt