The invention provides new compounds of formula (I) wherein R
1
, R
2
, R
3
, R
4
, and X have different meanings. Preparative processes, pharmaceutical compositions, and uses thereof in the treatment or prevention of conditions mediated by melatonin receptors are also provided.
The invention provides new compounds of formula (I) wherein R1, R2, R3, R4, and X have different meanings. Preparative processes, pharmaceutical compositions, and uses thereof in the treatment or prevention of conditions mediated by melatonin receptors are also provided.