prov:value
| - A suitable aromatic radical is, for example, a phenyl radical, which can be substituted by C1 -C4 alkyl, for example methyl or ethyl, C1 -C4 alkoxy, for example methoxy or ethoxy, halogen, for example chlorine, carboxyl or sulfo, and a suitable heterocyclic radical is, for example, a piperazine radical.
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