Using O=C(O)Cn1nc(-c2ccccc2)c2c(Cl)c(-c3ccccc3)nnc21, CC(C)COC(=O)Cl to produce CC(C)COC(=O)Cn1nc(-c2ccccc2)c2c(Cl)c(-c3ccccc3)nnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.