Using Cc1cccc(C)c1Oc1ccc2c(c1)C(=O)N(CC(=O)O)C2=O, CO to produce COC(=O)CN1C(=O)c2ccc(Oc3c(C)cccc3C)cc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.