Using O=C1c2cc(Br)c(F)cc2CC12CCC(O)CC2, CCC(C)(C)[O-] to produce COC1CCC2(CC1)Cc1cc(F)c(Br)cc1C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.