| 摘要 |
Disperse monoazo dyes, useful for the dyeing and printing of polyester, polyamide and cellulose acetate fibers in navy-blue shades, having the formula <IMAGE> wherein R1 is Br, Cl or CN; R2 is CN or NO2; is C2-4-alkylene; and R4 is a selected aliphatic, cycloaliphatic, or aromatic radical.
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