3-[2-(Ethyl-{4-[6-(2-hydroxy-ethoxy)-benzothiazol-2-ylazo]-phenyl}-amino)-ethoxy]-propionitrile 、 alkaline earth salt of/the/ methylsulfuric acid 在
高氯酸盐 作用下,
以
氯苯 为溶剂,
以88%的产率得到2-(4-{[2-(2-Cyano-ethoxy)-ethyl]-ethyl-amino}-phenylazo)-6-(2-hydroxy-ethoxy)-3-methyl-benzothiazol-3-ium; perchlorate