Using CC1CN(Cc2ccc3c(Cl)ccnc3c2)C(=O)[C@H](C)N1C(=O)OCc1ccccc1 to produce CC1CN(Cc2ccc3c(Cl)ccnc3c2)C(=O)[C@H](C)N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.