Using COC(=O)C1(CCc2ccc(C(C)(C)C)cc2C(C)(C)C)CCCC1=O to produce CC(C)(C)c1ccc(CCC2CCCC2=O)c(C(C)(C)C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.