| http://www.w3.org/ns/prov#value | - The substituent includes, for example, a halogen atom such as a fluorine atom, a chlorine atom, a bromine atom, an iodine atom; an alkoxy group such as a methoxy group, an ethoxy group, a tert-butoxy group; an aryloxy group such as a phenoxy group, a p-tolyloxy group; an alkoxycarbonyl group such as a methoxycarbonyl group, a butoxycarbonyl group, a phenoxycarbonyl group; an acyloxy group such as
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