prov:value
| - eneral formulae (II) to (VI), ##STR00011## where R1' is a hydrogen atom, an amino group, a C.sub.1-C.sub.6-alkylamino group, a C.sub.1-C.sub.6-N,N-dialkylamino group, aC.sub.1-C.sub.6-alkylcyano group, a hydroxyl group, a nitro group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C.sub.1-C.sub.6-alkyl group, a C.sub.1-C.sub.6-alkyloxy group, a C.sub.1-C.sub.6-hydroxyalkyl group,
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