The invention relates to a preparative method for isatin, including the procedures as follows: compounding hydroxylamine sulphate;
本发明涉及一种靛红的制备方法，该方法包括如下步骤：合成硫酸羟胺；
The invention relates to a preparative method for isatin, including the procedures as follows: compounding hydroxylamine sulphate;
本发明涉及一种靛红的制备方法，该方法包括如下步骤：合成硫酸羟胺；
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