Using CCc1sc2nc(C)c(CC(=O)OC)c(-c3ccc(C)cc3)c2c1C to produce CCc1sc2nc(C)c(CC(=O)O)c(-c3ccc(C)cc3)c2c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.