| http://www.w3.org/ns/prov#value | - The organic solvent used for extraction is not particularly restricted, and may be an alcohol such as methanol, ethanol, propanol or propylene glycol, a ketone such as acetone, an ester such as ethyl acetate, an ether such as diethyl ether or a hydrocarbon such as hexane or heptane, either alone or in admixture as appropriate.
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