Using Cc1oc2c3c(ccc2c1C)CCC(CNCCCNc1ncccn1)O3 to produce CC1Oc2c(ccc3c2OC(CNCCCNc2ncccn2)CC3)C1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.