Using Nc1nc2ccccc2n1-c1nc(N2CCOCC2)nc(N2CCOCC2)n1, O=COCCl to produce COC(=O)Nc1nc2ccccc2n1-c1nc(N2CCOCC2)nc(N2CCOCC2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.