Using COC(=O)CC1Cc2ccc(OCCCNc3ncccn3)cc2CNC1=O to produce O=C(O)CC1Cc2ccc(OCCCNC3=NCCCN3)cc2CNC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.