prov:value
| - ed by a nitrogenous group; -R8 and R9 can also form, with the nitrogen atom which carries them, a 5- or 6-membered nitrogenous heterocycle optionally substituted by one or more alkyl, hydroxy! or ureido groups; -R10 represents a hydrogen atom, a halogen atom, such as a chlorine atom, a C1-C4 alkyl radical, a sulpho radical, a carboxyl radical, a C1-C4 monohydroxyalkyl radical, a C1 -C4 hydroxyalko
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