Using CCO, O=C(O)c1c(-c2ccccc2)nn2c1-c1ccccc1CC2 to produce CCOC(=O)c1c(-c2ccccc2)nn2c1-c1ccccc1CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.