(A) Effect of compound 6 on the expression of Bcl-2 protein in H₂O₂-induced SH-SY5Y. (B) Effect of compound 6 on the expression of caspase 3 protein in H₂O₂-induced SH-SY5Y. (C) Effect of compound 6 on the expression of Bax protein in H₂O₂-induced SH-SY5Y. (D) Effect of compound 6 on the expression of SOD-2 protein in H₂O₂-induced SH-SY5Y. Values are expressed as means±S.D. from three individual samples. *P<0.05 against the H₂O₂ treated group.