3-(Phenylazo)-4-hydroxy-5-(2,4-dichloro-1,3,5-triazine-6-ylamino)-2,7-naphthalenedisulfonic acid

5-[(4,6-Dichloro-1,3,5-triazin-2-yl)amino]-4-hydroxy-3-(phenylazo)-2,7-naphthalenedisulfonic acid

5-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-4-hydroxy-3-(phenylazo)naphthalene-2,7-disulphonic acid