Using Clc1c(Oc2ncccc2Br)ccc2c1nnn2CC1CC1, CC(C)=O to produce CC(C)(O)c1cccnc1Oc1ccc2c(nnn2CC2CC2)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.