| abstract |
1. Bicyclic compounds of the general formula I see diagramm : EP0010213,P16,F7 where Y is see diagramm : EP0010213,P16,F8 see diagramm : EP0010213,P17,F1 see diagramm : EP0010213,P17,F2 see diagramm : EP0010213,P17,F3 see diagramm : EP0010213,P17,F4 or see diagramm : EP0010213,P17,F5 where R**1 is hydrogen or methyl, R**2 is hydrogen, methyl or ethyl and R**3 ist methyl or vinyl, with the exception of the compound of the general formula Ib where R**1 and R**2 are both hydrogen. |