| http://www.w3.org/ns/prov#value | - etoxy group and a benzoyloxy group), acylamino groups (each preferably having 2 to 20 carbon atoms, more preferably 2 to 16 carbon atoms, and particularly preferably 2 to 10 carbon atoms; such as an acetylamino group and a benzoylamino group), alkoxycarbonylamino groups (each preferably having 2 to 20 carbon atoms, more preferably 2 to 16 carbon atoms, and particularly preferably 2 to 12 carbon at
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