| http://www.w3.org/ns/prov#value | - The oil-soluble sulfonates can be represented for the most part by one of the following formulae: R7???T???(SO3)d and R8???(SO3)e, wherein T is a cyclic nucleus such as, for example, benzene, naphthalene, anthracene, diphenylene oxide, diphenylene sulfide, petroleum naphthenes, etc.; R7 is an aliphatic group such as alkyl, alkenyl, alkoxy, alkoxyalkyl, etc.; the R7 group combined with the T group
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