Using CC(=O)Oc1ccc2c(C)c(CN3C(=O)c4ccccc4C3=O)c(=O)oc2c1C to produce Cc1c(CN2C(=O)c3ccccc3C2=O)c(=O)oc2c(C)c(O)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.