Using CCOC(Cc1cccc(NCCCN2CCOc3ccccc32)c1)C(=O)OC to produce CCOC(Cc1cccc(NCCCN2CCOc3ccccc32)c1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.