The invention discloses with the active bicyclic gamma-amino acid derivative of splendid alpha 2 delta ligands. Specifically, the invention discloses the compounds that following general formula (I) is represented, in the structural formula, R1, R2, R2 ', R4, R5, R6, R7, R8 and R8 ' respectively represent hydrogen atom etc.； R3 represents hydrogen atom, halogen atom, C1-C6 alkyl etc..本發明公開了具有極佳α2δ配體活性的雙環γ-氨基酸衍生物。具體地說，本發明公開了以下通式(I)代表的化合物，在該結構式中，R1、R2、R2′、R4、R5、R6、R7、R8和R8′各自代表氫原子等；R3代表氫原子、鹵素原子、C1-C6烷基等。
