| http://www.w3.org/ns/prov#value | - xoalkyl group or a substituted or unsubstituted C6-C18 aryl, aralkyl or aryloxoalkyl group, or at least two of R2, R3 and R4 may bond together to form a ring with the sulfur atom to which they are attached, N is an integer of 0 to 2, R8 is hydrogen or C1-C10 alkyl, B is a single bond or a divalent C1-C10 organic group which may have oxygen substituted thereon, a is an integer of 0 to 3, b is an in
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