The invention relates to derivatives of a compound of formula I:
wherein R
1
to R
7
and X
1
to X
6
are as defined herein.
The invention relates to the uses thereof for treating diseases, conditions and/or disorders mediated by kappa opioid receptors (KORs). Specifically, the compounds are selective antagonists of KORs and are highly selective to KORs relative to mu and delta opioid receptors.