Using CCOC(=O)C(Cc1ccc2ccccc2n1)(OC1CCCCO1)C(=O)OCC to produce O=C(O)C(Cc1ccc2ccccc2n1)(OC1CCCCO1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.