Using O=C1Cc2cc(Cl)ccc2N1, Nc1ccc2c(c1)COC2=O to produce Nc1ccc2c(c1)COC2=C1C(=O)Nc2ccc(Cl)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.