Using Cc1c(C)c2c(c(-c3ccc(C(C)(C)C)cc3)c1C)CC(C)C2=O to produce CC1=Cc2c(c(C)c(C)c(C)c2-c2ccc(C(C)(C)C)cc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.