| http://www.w3.org/ns/prov#value | - Examples of such organic solvents include alcohols such as methanol, ethanol, and propanol; ketones such as acetone and methyl ethyl ketone; esters such as methyl acetate and ethyl acetate; and compounds represented by a general formula (1) shown below: (wherein, R1 represents an alkyl group of 1 to 3 carbon atoms, and X represents a methylene group (???CH2???) or a bivalent group represented by a
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