| http://www.w3.org/ns/prov#value | - ##STR17## wherein R1 is a group having its formula selected from the group consisting of: ##STR18## wherein A- is selected from the group consisting of CH3 COO-, Cl-, HOCH2 COO-, C6 H5 COO-, and HOC6 H4 COO- wherein x, y, x', and y' are as defined above.
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