N a yellowish crystalline heterocyclic compound used as a fungicide; benzo-1,4-pyran. Its molecular structural unit is found in many dyes, such as rhodamine and fluorescein. Formula: CH2(C6H4)2O 呫吨
The cationic dye may be chosen from azo dyes, azomethine dyes, methine dyes and xanthene dyes.
优选地，阳离子染料选自偶氮染料、偶氮甲碱染料、次甲基染料和？吨染料。
Methyl 9-hydroxyl-9-xanthene carboxyate which is an important intermediate of xanthene anticholiergic drugs was easily synthesized from methyl 9-xanthene carboxyate.
羟基-9-呫吨羧酸甲酯是合成呫吨类抗胆碱能药物的一种重要的中间体。
In the present paper, a series of xanthene-2-carboxylic acids and xanthone-2-carboxylic acids with electron withdrawing groups on the 7-position had been synthesized.
本文合成了一系列7位拉电子基团取代的氧杂蒽-2-羧酸及氧杂蒽酮-2-羧酸化合物。
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