Using CC(=O)Cl, COc1cc(-n2ccc3nc(-c4ccc(Cl)cc4)sc3c2=O)ccc1OC1CNC1 to produce COc1cc(-n2ccc3nc(-c4ccc(Cl)cc4)sc3c2=O)ccc1OC1CN(C(C)=O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.