Using CC(C)Br, O=Cc1ccc(O)c(C23CC4CC(CC(C4)C2)C3)c1 to produce CC(C)Oc1ccc(C=O)cc1C12CC3CC(CC(C3)C1)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.