Using C1COCCO1, CC(C)(C)OC(=O)N1CCC(CNc2cc(-c3ccccc3Cl)nc3c(Br)cnn23)CC1 to produce CN(c1cc(-c2ccccc2Cl)nc2c(Br)cnn12)C1CCNCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.