| http://www.w3.org/ns/prov#value | - , and 2-naphthyloxy), a heterocyclic oxy group (a heterocyclic oxy group having preferably 1 to 30 carbon atoms, more preferably 1 to 20 carbon atoms, and particularly preferably 1 to 12 carbon atoms, e.g., pyridyloxy, pyrazyloxy, pyrimidyloxy, and quinolyloxy), an acyl group (preferably an acyl group having 1 to 30 carbon atoms, more preferably 1 to 20 carbon atoms, and particularly preferably 1
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