| http://www.w3.org/ns/prov#value | - aryl containing 6 to 10 carbon atoms, such as phenyl or tolyl, or taken together are atoms necessary tocomplete a benzo group represented by the broken line between R.sup.3 and R.sup.4.Other useful heterocyclic thione compounds within the above formula are imidazoline-2-thione compounds represented by the formula: ##STR5## wherein Z.sup.2 is alkylene containing 1 to 4 carbon atoms, such as methyl,
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