The disclosures herein relate to novel compounds of formula wherein W, X and Y
1
, Y
2
, Y
3
and Y
4
are defined herein, and their use in treating, preventing, ameliorating, controlling or reducing the risk of neurological or psychiatric disorders associated with orexin receptors.
The disclosures herein relate to novel compounds of formula wherein W, X and Y1, Y2, Y3 and Y4 are defined herein, and their use in treating, preventing, ameliorating, controlling or reducing the risk of neurological or psychiatric disorders associated with orexin receptors.