| http://www.w3.org/ns/prov#value | - In the above formulas, the sum of x+y+z in each chain segment is at least 1; P is an integer of 1 or more; q is at least 2; n is at least 1; R1 is selected from the group consisting of hydrogen, phenyl, benzyl, alkyl, cycloalkyl and substituted phenyl; and R7 is a member of the group consisting of:
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