prov:value
| - A can denote, for example, hydrogen, alkoxy with 1-4 C atoms, such as methoxy, ethoxy or butoxy, in particular methoxy, it also being possible for the alkyl chain, with the exception of the ??-C atoms, to be substituted, for example by hydroxyl or by halogen, preferably chlorine or bromine, alkoxycarbonyl with 1-4 alkyl C atoms, in particular methoxy- or ethoxy-carbonyl, alkenyloxy with 3-6 C atom
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