Using CC(=O)OC1c2c(-c3ccccc3)c(-c3ccc(Cl)cc3)c(CC(=O)OC(C)(C)C)n2CC1(C)C to produce COC1c2c(-c3ccccc3)c(-c3ccc(Cl)cc3)c(CC(=O)O)n2CC1(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.