Using COC(=O)CBr, Cc1sc2c(Br)c3ccccc3c(-c3cc(C(C)C)c(O)c(C(C)C)c3)c2c1C to produce COC(=O)COc1c(C(C)C)cc(-c2c3ccccc3c(Br)c3sc(C)c(C)c23)cc1C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.