Using COc1c(C)c2c(c(OS(=O)(=O)c3ccc(C)cc3)c1CC1=CC(C)(CC(=O)O)CC1)C(=O)OC2, CO to produce COc1c(C)c2c(c(O)c1CC1=C(C)C(CC(=O)O)CC1)C(=O)OC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.