| http://www.w3.org/ns/prov#value | - ##STR00002## [wherein, X is a halogen atom or a group of the formula --S(O).sub.n--R.sup.1; n is 0 or an integer of 1 or 2; and R.sup.1 is a phenyl group which may have 1 to 3 substituents, selected from the group consisting of a nitro group, a
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