| 摘要 |
The present invention refers to dyestuffs of the formula (I) (see formula I) wherein R1 is H or (C1-C4)-alkyl; R2 is H or (C1-C4)-alkyl; each of X1 and X2, independently, is a labile atom or group; and M is H, an alkali metal, an ammonium ion or the equivalent of an alkaline earth metal, wherein compounds wherein R1 and R2 are H are excluded, mixtures of the dyestuffs of the formula (I) with dyestuffs of the formula (II) (see formula II) wherein each of X3 and X4, independently, is a labile atom or group; L is an organic linking group; and M is H, an alkali metal, an ammonium ion or the equivalent of an alkaline earth metal. processes for the preparation of said dyestuffs and said dyestuff mixtures a nd their use for dyeing and printing hydroxy-and/or carboxamido-containing fibe r materials.
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