| http://www.w3.org/ns/prov#value | - --CH2 -- and --CH2 --NH--, or a single bond; B4 is --(CH2)w -- wherein w is an integer of 0 to 3; A1, A2 and A3 are each independently a group selected from the group consisting of ##STR3## or a single bond and A1, A2 and A3 may be substituted by a halogen such as fluorine and chlorine or a lower alkyl group such as methyl or ethyl; X1, Y1 and Z1 are each independently a hydrogen atom or a halogen
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