| 摘要 |
The invention relates to compounds of formula (I)wherein Rand Rtogether form the following carbon-containing chain:wherein Rrepresents a hydrogen atom or an alkyl group, Rrepresents a hydrogen atom or an alkyl, aryl, heteroaryl, 3,4-dioxocyclobutenyl, alkylcarbonyl, cycloalkylcarbonyl, heterocycloalkylcarbonyl, benzoyl, arylsulphonyl or heteroarylsulphonyl group, each of those groups optionally being substituted, or Rand Rtogether with the nitrogen atom carrying them form a 5- to 8-membered ring, the ring thereby formed optionally being substituted. |
