| 摘要 |
The present invention refers to dyestuffs of the formula I <IMG> wherein R is an optionally substituted alkyl group; each of R1, R2 and R3, independently, is N or an optionally substituted alky l group; each of X1 and X2, independently, is a labile atom or group; and each of A1 and A2, independently, is a chromophoric residue, processes for their preparation and their use for dyeing and printing hydrox y- and/or carboxamido-containing fiber materials.
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