Using CC(=O)OCC(=O)Cl, Cc1nccn2c([C@@H]3CCNC3)nc(Br)c12 to produce CC(=O)OCC(=O)N1CC[C@@H](c2nc(Br)c3c(C)nccn23)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.