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Process for the preparation of 1,4-bis ((2- (dimethylamino) ethyl) amino) -5,8-dihydroxyanthracene-9,10-dione.
Process for the preparation of 1,4-bis ((2- (dimethylamino) ethyl) amino) -5,8-dihydroxyanthracene-9,10-dione.
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机译：制备1，4-双（（（2-（二甲基氨基）乙基）氨基）-5,8-二羟基蒽-9,10-二酮的方法。
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摘要
A process for the preparation of the compound AQ4 of formula 3: ** (Formula) ** or a salt or N -oxide thereof, including the step: ** (Formula) ** wherein the reaction is carried out using a nitrogen atmosphere and the reaction mixture is heated to cause sublimation of solid, with frequent remelting of the sublimate to the reaction mixture.
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