abstract |
The present invention relates to compounds of formula (I), in which R1, R2, R3, R4, X and Y have the meanings indicated in the description. These compounds have immuno-modulating effects, as well as an inhibiting or regulating effect on the release of IL-1.beta. and/or TNF-.alpha.. They can therefore be used for the treatment of diseases associated with a disturbance of the immune system. |