Using O=C(Cl)Cc1ccc2c(c1)OCO2, Nc1nc(C2CCNCC2)c2ccccc2n1 to produce Nc1nc(C2CCN(C(=O)Cc3ccc4c(c3)OCO4)CC2)c2ccccc2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.