Using CCOC(=O)c1cn(-c2nc(NC3CCCC3)c3ncn(C4O[C@H](CO)[C@@H](O)[C@H]4O)c3n2)nn1 to produce O=C(O)c1cn(-c2nc(NC3CCCC3)c3ncn(C4O[C@H](CO)[C@@H](O)[C@H]4O)c3n2)nn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.