Using O=C1NC(O)c2nc(Oc3ccc4c(c3)CCN(C3CCC3)CC4)ccc21 to produce O=C1NCc2nc(Oc3ccc4c(c3)CCN(C3CCC3)CC4)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.