| http://www.w3.org/ns/prov#value | - R.sub.8 can independently have linear or branched structure of C.sub.nH.sub.m, where n is an integer of about 2-20, and m is an integer of about 2-40. Any one or more of the hydrogen atoms in R.sub.1 to R.sub.8 may be substituted with halogens, cationic
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