| http://www.w3.org/ns/prov#value | - carbon atoms in R1 and R2 being in the range of 5 to 10, with at least one of R1 and R2 being a tertiary alkyl group, and R3 is a hydrogen atom; or D) R1 and R2 are both, independently, alkyl groups with the total number of carbon atoms in R1 and R2 being in the range of 5 to 10, with at least one of R1 and R2 being a tertiary alkyl group, and R3 is an alkyl group containing 1 or 2 carbon atoms.
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