Using CCOCC, Cc1ccc2c(N3CCC[C@H](CNC(=O)O[C@@H]4CCOC4)C3)nc(-c3ccccc3O)nc2c1 to produce Cc1ccc2c(N3CCC[C@@H](CN(C(=O)O)[C@@H]4CCOC4)C3)nc(-c3ccccc3O)nc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.