| http://www.w3.org/ns/prov#value | - Specifically preferred activating groups include alkyl of up to 5 carbon atoms, e.g., methyl, ethyl, isopropyl or t-butyl; alkoxy of up to 5 carbon atoms, e.g., methoxy, ethoxy, butoxy, or amyloxy; halo, particularly chloro or bromo; and dialkylamino where each alkyl has up to 5 carbon atoms such as dimethylamino and diethylamino.
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