Using COC(=O)c1ccc(Cc2c(C)cc3c(c2C)C(C)(C)CCO3)o1 to produce Cc1cc2c(c(C)c1Cc1ccc(C(=O)O)o1)C(C)(C)CCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.