| http://www.w3.org/ns/prov#value | - An example of a typical compound includes a salt of a cation and an anion represented by the following general formula: [A].sup.m+[B].sup.m-The cation [A].sup.m+ is preferably an onium, and its structure, for example, can be represented by the following general formula: [(R.sup.1).sub.a Q].sup.m+R.sup.1 is an organic group having 1 to 60 carbon atoms and including as many atoms, other than carbon
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