| http://www.w3.org/ns/prov#value | - For the preparation of the products of this invention, the pendant sulfonyl groups in the form represented by the formulas: ##STR4## wherein X is halogen, especially fluorine or chlorine; hydroxyl; alkyl containing up to four carbon atoms; aryl or OZ where Z is a metallic atom, especially an atom of an alkali metal, alkyl containing up to four carbon atoms or aryl; are converted to:
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