| http://www.w3.org/ns/prov#value | - endently an alkyl group having from 1 to 4 carbon atoms; (v) CH3CH???CHCOOR9, wherein R9 is an alkyl group having from 1 to 4 carbon atoms; (vi) styrene; and (vii) R12CH???CHR13, wherein R12 and R13 are independently hydrogen or methyl. 22.
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