http://www.w3.org/ns/prov#value | - R6 is a hydrogen, hydroxy group, methoxy group, a C1 to C22 alkyl group, (which can be an ester, amide, or ether interrupted group), and mixtures thereof, preferably a C1 to C22 alkyl group with an ether or ester interrupted group, and mixtures thereof, more preferably a methoxy group, a C8 to C22 alkyl group with an ester interrupted group, and mixtures thereof;
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