The invention relates to tetrazole compounds of formula (I) wherein X, Y, Z, R
1
, R
2
and R
3
are as described in the description; to pharmaceutically acceptable salts thereof, and to the use of such compounds use as medicaments, especially as orexin receptor antagonists.
该发明涉及式(I)的
四唑化合物,其中X、Y、Z、R1、R2和R3如描述中所述;其药学上可接受的盐,以及将这些化合物用作药物,特别是促进睡眠的药物。