| abstract |
The present invention relates to the orexin receptor antagonists of the general formula (I), which are selective to orexin I receptors. (I) -wherein Ar stands for phenyl group or a 5- or 6-membered heterocyclic ring containing 1-3 identical or different heteroatoms or methylenedioxyphenyl group -these groups may optionally be substituted with one or more identical or different C1.4 alkyl group, halogen atom, hydroxyl group, C1-4 alkoxy group, trihalogenomethyl group, NHC1.4 alkyl, -N(CI-4 alkyl)2 or -NHC(=0)-C1-4 alkyl group, |