| http://www.w3.org/ns/prov#value | - Preferred solvents are alcohols such as methanol, ethanol, etc., ethers such as tetrahydrofuran, dioxane, etc.,esters such as ethyl acetate, fatty acids such as acetic acid, etc., and mixtures of such organic solvents with water.Referring to the methods using an acid, the acid includes lower fatty acids such as formic acid, acetic acid, etc., trihaloacetic acids such as trichloroacetic acid, trif
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