| http://www.w3.org/ns/prov#value | - M(NR.sup.1R.sup.2).sub.x(NR.sup.3).sub.y, wherein M is a metal except silicon, R.sup.1, R.sup.2, and R.sup.3 are each independently a hydrogen or an organic group, x is 1 or more, y is 0 or more, and the values of x and y are dependent on the oxidation
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