| http://www.w3.org/ns/prov#value | - ???(CH2)n???CH3, ???CH(CH3)???(CH2)n???CH3, ???CH(CH2CH3)???(CH2)n???CH3, ???CH(CH2CH3)2, ???C(CH3)2???(CH2)n???CH3, ???C(CH3)(CH2CH3)???(CH2)n???CH3, ???C6H5, ???C6H5(CH3), ???C6H5(CH3)2, ???(CH2)n???C6H5???, ???(CH2)n???C6H5(CH3), ???(CH2)n???C6H5(CH3)2 wherein n is an integer not smaller than 0 and the total number of carbon atoms is not more than 20.
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