| http://www.w3.org/ns/prov#value | - 5 carbon atoms, which may have a substituent, an alkylester group having from 1 to 5 carbon atoms, which may have a substituent, an arylester group having from 6 to 12 carbon atoms, which may have a substituent, a carboxyl group, an aldehyde group, a hydroxyl group, a halogen atom or a hydrogen atom; e and f each are an integer of from 1 to 4; and u2 is an integer of from 10 to 200, in which form
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