| http://www.w3.org/ns/prov#value | - lactone, esters such as ethyl lactate, n-amyl acetate and n-butyl acetate, alcohols such as n-propanol, iso-propanol, ketones such as cyclohexanone, methyl isobutyl ketone, diisobutyl ketone and 2-heptanone, lactones such as ??-butyrolactone and ??-caprolactone, ethers such as diphenyl ether and anisole, hydrocarbons such as mesitylene, toluene and xylene, and heterocyclic compounds such as N-meth
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