Using COC(=O)c1ccc(Cc2cc3c(cc2C)C(C)(C)CCC3(C)C)o1 to produce Cc1cc2c(cc1Cc1ccc(C(=O)O)o1)C(C)(C)CCC2(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.