| http://www.w3.org/ns/prov#value | - lence of X.The Z group in the general formula (I) of the organic boron compound is represented by the following formulas: ##STR2## in which R.sub.1 is a hydrogen atom, an alkyl group, or a substituted or nonsubstituted aryl group; R.sub.2 is a substitutedor nonsubstituted aryl group; R.sub.3 is a hydrogen atom, an alkyl group, or an aryl group; m is an integer of 1-4; R.sub.4 is a hydrogen atom, a
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