| 摘要 |
The present invention refers to dyestuffs of the formula I <CHEM> wherein each of R<1>, R<2>, R<3>, R<4> and R<5>, independently, is H or an optionally substituted alkyl group; each of X1 and X2, independently, is a labile atom or group; each of x and y, independently, is 0 or 1 and at least one of x and y is 1; each of a and b is 2 to 5 and when each of x and y is 1, a > b; and z is 0, 1, 2, 3 or 4; and wherein the variables D1 and D2 are defined as given in claim 1, processes for their preparation and their use for dyeing and printing hydroxy- and/or carboxamido-containing fiber materials.
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