| http://www.w3.org/ns/prov#value | - Exemplary solvents which can be employed include aromatic hydrocarbons such as benzene, toluene, xylene and mesitylene; nitriles such as acetonitrile and benzonitrile; sulfones such as sulforane, methylsulforane and dimethylsulforane; ethers such as tetrahydrofuran, 1,4-dioxane and 1,2-dimethoxyethane; ketones such as acetone, methyl ethyl ketone; esters such as ethyl acetate and ethyl benzoate; a
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