Succinic acid chloroanhydride

Sodium hydroxide Succinic acid chloroanhydride Methyl chloride... 

By the etherification of succinic acid chloroanhydride with dimethylaminoethanol hydrochloride in the presence of sodium hydroxide succinylcholine was prepared. Then the obtained succinylcholine was purified. To the succinylcholine the methylchloride was added (1 2 mols) and the succinylcholine dichloride was obtained as white powder. 

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