| http://www.w3.org/ns/prov#value | - In Formula I, R1 is a group substituted for a hydrogen atom at a position that is ortho to the OR3 group(s) on the aromatic ring(s) of the Ar moiety R1 is a halogen such as bromo, and chloro; or a hydrocarbon radical such as an alkyl group, a cycloaliphatic group or aromatic group.
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