| http://www.w3.org/ns/prov#value | - in which R59 stands for a C6-28 alkyl or alkenyl group, R60 and R61 are each, independently of one another, C1-4 alkyl groups; ?? stands for the number 0 or 1, ?? and ?? are each selected independently of one another from whole numbers from 1 to 4 and Y is oxygen or nitrogen and X is an anion.
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