Using Cn1c(Nc2ccc(Oc3ncccc3C=O)cc2)nc2ccccc21, C1COCCN1 to produce Cn1c(Nc2ccc(Oc3ncccc3CN3CCOCC3)cc2)nc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.