| 摘要 |
<p>Azo colorants of the formula wherein A denotes the radical of a heterocyclic diazo component, R1 denotes a hydroxyl, alkyl, phenyl or alkoxycarbonyl group, R2 denotes a H atom or an alkyl, phenyl, acyl, nitrile, alkoxycarbonyl or carbamoyl group, and X and Y denote substituents which do not confer solubility in water, which are useful for coloring highmolecular organic material.</p> |
