| http://www.w3.org/ns/prov#value | - s, for instance, methyl, for instance, both R2 and R3 are methyl groups; R4 is selected from hydrogen, methyl and ethyl; X??? is an anion such as chloride, bromide, methylsulfate, sulfate, or the like, to provide electrical neutrality; A is a alkoxy group, especially a ethoxy, propoxy or butoxy group; and p is from 0 to about 30, or from 2 to about 15, or from 2 to about 8.
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