| 摘要 |
The present invention provides the blue dyestuffs of the following formula (I), wherein R1, R2, X, X1, X2, Y, and Z are defined in this document. These kinds of dyestuffs are suitable for dyeing and printing of materials containing either cellulose fibers, such as cotton, synthetic cotton, hemp, and synthetic hemp, or synthetic polyamide and polyurethane fibers, such as wool, silk, and nylon.
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