| http://www.w3.org/ns/prov#value | - For example, in the case of suitably neutralizing the reaction mixture or when impurities are present, an organic solvent such as ethyl acetate that is not miscible with water is added after removing the impurities by filtration, and after washing with water and so forth, the organic layer containing the desired compound is separated, and after drying with anhydrous magnesium sulfate or anhydrous
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