| http://www.w3.org/ns/prov#value | - In the structure named above each R.sub.2 is a C.sub.1 -C.sub.6 alkyl or hydroxyalkyl group, R.sub.3 is C.sub.11 -C.sub.21 hydrocarbyl group, n is 2 to 4 and X.sup.- is a suitable anion, such as an halide (e.g., chloride or bromide) or methyl
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