| http://www.w3.org/ns/prov#value | - a furan ring, a thiophene ring, an imidazole ring, a benzimidazole ring or the like can be given.Of these, a pyridine ring, a furan ring and a thiophene ring are preferable.As the substituent, a halogen such as a fluorine atom, a trifluoromethyl group, a cyano group, a phenyl group or the like can be given.
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