prov:value
| - a phenoxycarbonyl, a thienocarbonyl, a pyridylcarbonyl, a methylpyridylcarbonyl, a C1 -C4 -alkoxycarbonyl, a benzoyl, a group a group --CO--CH(R10)--NR11 R'11, a group (CH2)t COR12, a group CO(CH2)t COR12, a carbamoyl which is unsubstituted or substituted by a phenyl or by one or two C1 -C4 -alkyl groups; m is 1 or, when R6 is a halogen, a C1 -C7 -alkyl or a C1 -C7 -alkoxy, m can also be 2, 3 or
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