| http://www.w3.org/ns/prov#value | - rmula --CO--(D)l -- or --D--CO--, wherein D is a lower alkylene group, l is an integer of 0 or 1; B is a 5- or 6-membered saturated or unsaturated heterocyclic group which may have at least one substituent selected from the group consisting of a lower alkyl group which may have at least one hydroxy group as the substituent, an oxo group, a carboxy group, a lower alkoxycarbonyl group, a pyridyl gro
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