4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?and 2,4,6-Trichloro-1,3,5-triazine condensation, 2-Aminonaphthalene-1-sulfonic acid diazo, and condensation things coupled, again with registration, 2-(3-Aminophenylsulfonyl)ethyl hydrogen sulfate condensation.