Using CC(C)(C)Oc1ncc(Br)c(OC(C)(C)C)n1, O=c1c2ccccc2ccc2ccccc12 to produce CC(C)(C)Oc1ncc(C2(O)c3ccccc3C=Cc3ccccc32)c(OC(C)(C)C)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.