Using Cc1c[nH]c2c(OCc3ccccc3)cc3c(c12)C(CO)CN3C(=O)O to produce Cc1c[nH]c2c(O)cc3c(c12)C(CO)CN3C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.