Using [OH-], Cc1c(O)cccc1-n1nc2c(c1N)c(=O)[nH]c1ccccc12 to produce Cc1c(OCCC(=O)O)cccc1-n1nc2c(c1N)c(=O)[nH]c1ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.