| http://www.w3.org/ns/prov#value | - R.sup.12 is optionally substituted by R.sup.11, with the proviso that Q is other than a phenyl when Z.sup.0 is a covalent single bond; R.sup.9, R.sup.11, and R.sup.13 are independently selected from the group consisting of hydrido, hydroxy, amino,
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