| http://www.w3.org/ns/prov#value | - B is a hydrogen atom or a monovalent terminal organic radical, B' is B or a valence bond, with the proviso that at least B' is a valence bond interconnecting a Z-bonded R3 radical to another Z, Z' is a linkage through which B, or B', and R3 are covalently bonded together, s is an integer or number of at least 1 and can be as high as 25 or higher, t is an integer or number of at least 1, and can be
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