Using c1cnc2ccc(Cc3cnc4ccc(N5CCC6(CC5)OCCO6)nn34)cc2c1 to produce O=C1CCN(c2ccc3ncc(Cc4ccc5ncccc5c4)n3n2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.