of the formula (37) being unsubstituted or substituted by C1 -C4 alkyl, C1 -C4 alkoxy, C2 -C4 alkanoylamino, halogen, sulfo or a radical of the formula --X--SO2 CH2 CH2 OSO3 H, in which X is a direct bond or a radical of the formula --CONHCH2 CH2 --, and the aniline, 1-aminonaphthalene and the coupling component of the formula (37) together containing only one sulfo group and together containing o