| http://www.w3.org/ns/prov#value | - above, wherein, in the formula (I), n is an integer of 2, and Y is hydrogen atom or a lower alkyl group having 1 to 4 carbon atoms. (19) The compound or salt thereof according to (4) mentioned above, wherein, in the formula (1), Link is- (CH2) n-, n is an integer of 2, AR binds at the position of C2 in the aromatic ring (E), Rs binds to one of ring-constituting carbon atoms C3, C4 and C5, Rs is-O
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