Among the other solvents which may be employed in place of toluene for the hydrolysis of the picrate are ether, benzene, carbon disulfide, carbon tetrachloride, and amyl alcohol. When using another aqueous strong mineral acid in place .of hydrochloric ,for the hydrolysis of the picrate, the corresponding salt is obtained (e. g,,d-tubocurarine sulfate whenusing sulfuric acid) ; and, if d_tubocurarine chloride is desired, it may be obtained from such salt inthe conventional manner.
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