| http://www.w3.org/ns/prov#value | - b each, independently of the others, is an integer which is 0, 1, 2, or 3, wherein each R5, and R6, independently of the other, is (i) an alkyl group, (ii) an aryl group, (iii) an arylalkyl group, (iv) an alkylaryl group, (v) a halogen atom, (vi) an ester group, (vii) an amide group, (viii) a sulfone group, (ix) an amine group or ammonium group, (x) a nitrile group, (xi) a nitro group; (xii) a hy
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