It is intended to provide a bicyclic γ-amino acid derivative having excellent activity as an α
2
δ ligand. The present invention provides a compound represented by the general formula (I):
wherein R
1
, R
2
, R
2′
, R
4
, R
5
, R
6
, R
7
, R
8
, and R
8′
are a hydrogen atom or the like; and R
3
is a hydrogen atom, a halogen atom, a C1-C6 alkyl group, or the like.
It is intended to provide a bicyclic γ-amino acid derivative having excellent activity as an α2δ ligand. The present invention provides a compound represented by the general formula (I):
wherein R1, R2, R2′, R4, R5, R6, R7, R8, and R8′ are a hydrogen atom or the like; and R3 is a hydrogen atom, a halogen atom, a C1-C6 alkyl group, or the like.