prov:value
| - It may include, e.g., halogens such as a fluorine atom, a chlorine atom and a bromine atom, a trifluoromethyl group, a trichloromethyl group, a tribromomethyl group, a nitro group, a nitrile group, alkoxyl groups such as a methoxyl group and an ethoxyl group, a carboxyl group, alkylcarbonyl groups such as a methylcarbonyl group and an ethylcarbonyl group, alkoxycarbonyl groups such as a methoxycar
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