| http://www.w3.org/ns/prov#value | - Particularly preferable mixed solvent is a mixture of three or more kinds of solvent different from each other, and the first solvent is selected from the ester such as methyl acetate, ethyl acetate, methyl formate and ethyl formate, acetone and ether such as dioxoran and dioxane, the second solvent is selected from the ketone having 4 to 7 carbon atoms including an acetoacetate, and the third sol
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