| http://www.w3.org/ns/prov#value | - endently optionally substituted alkyl groups which contain 1 to 6 carbon atoms, and wherein one or more of said alkyl groups may contain an aryl substituent or may be replaced with an aryl group, and wherein an anion may be present such as halide, acetate, methosulphate, and the like, and (2) tertiary amine oxides wherein at least one of the hydrocarbon groups linked to nitrogen is a linear or a b
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