Using CC(C)(C)OC(=O)N1CCN(Cc2coc3c(Br)cccc23)CC1 to produce COC(=O)c1cccc2c(CN3CCN(C(=O)OC(C)(C)C)CC3)coc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.