prov:value
| - Preferred are an ether such as ethyl ether, tetrahydrofuran and 1,2-dimethoxyethane, as aliphatic hydrocarbon such as n-pentane and n-hexane, a halogenated hydrocarbon such as methylene chloride, chloroform and ethylene dichloride, an aromatic hydrocarbon such as benzene and toluene, an aliphatic alcohol such as methanol, ethanol, n-propanol, isopropanol and tert-butanol, a dialkyl aliphatic acid
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