Compounds for treating an SCD-mediated disease or condition in a mammal, preferably a human, are disclosed, wherein the compounds are of formula (I): where x y, W, V, R 2 , R 3 , R 4 , R 5 , R 6 , R 6a , R 7 , R 7a , R 8 , R 8a , R 9 and R 9a are defined herein. Pharmaceutical compositions comprising the compounds of formula (I) are also disclosed.