Using COCCCl, Cc1ccccc1Nc1c(C(=O)C(C)C)cnc2c(O)cccc12 to produce COCCOc1cccc2c(Nc3ccccc3C)c(C(=O)C(C)C)cnc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.