| http://www.w3.org/ns/prov#value | - Herein, R??? is an alkyl radical of 1 to 8 carbon atoms or aryl radical as exemplified for R1 and R2, R?????? is an alkylene radical of 1 to 6 carbon atoms or arylene radical as exemplified for R3, and n is an integer of 0 to 10, especially 0 to 5.
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