| 摘要 |
The present invention relates to compounds of formula <IMAGE> (Ib) in which R1 is an aliphatic or alicyclic hydrocarbon radical, R2 is hydrogen, halogen or C1-8alkyl, M is hydrogen or an equivalent of a non-chromophoric cation and mixtures of such compounds with the corresponding ethers, which mixtures are useful as anionic dyestuffs.
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