| http://www.w3.org/ns/prov#value | - alkylsulfonyl, aminosulfonyl, alkylaminosulfonyl, N-arylaminosulfonyl, arylsulfonyl, and N-alkyl-N-arylaminosulfonyl; wherein at least one of R.sup.2 and R.sup.3 is other than hydrido; wherein R.sup.2 is other than alkyl or carboxyalkyl when R.sup.3 is
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