Using O=C1CCC(=O)N1Cl, COC(=O)c1cccc2[nH]c(=O)n(C)c12 to produce COC(=O)c1ccc(Cl)c2[nH]c(=O)n(C)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.