abstract |
The present invention relates to compounds of formula of formula I wherein R, R 1 . R 2 , R 2′ , R 3 , R 4 , R 5 , L 1 , L 2 and N are as described herein, compositions containing compounds of formula I, methods of manufacture of compounds of formula I and methods of treating psychiatric, metabolic, cardiovascular or sleep disorders with compounds of formula I. |