| http://www.w3.org/ns/prov#value | - R2 represents a hydrogen atom or an inert monovalent organic group, and is preferably a monovalent hydrocarbon group having from 1 to 4 carbon atoms. a, b, c and d each are an integer of from 0 to 200, and are preferably an integer of from 1 to 50. e is 0 or 1. m and n each are an integer of from 0 to 2, and are preferably 0. p is an integer of 1 or more, and is preferably an integer of from 1 to
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