Using CC(=O)O, Cc1oc2ccccc2c2nn(-c3ccc(C#N)cc3)c(=O)c1-2 to produce Cc1oc2ccccc2c2nn(-c3ccc(C(=O)O)cc3)c(=O)c1-2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.