Using COc1cc(-n2c(C[C@@H]3CCN(C(=O)C4CC4)C3)n[nH]c2=O)ccc1Br to produce O=C(C1CC1)N1CC[C@@H](Cc2n[nH]c(=O)n2-c2ccc(Br)c(O)c2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.