Using CCCCCc1cc(O)c2c(c1)OC(C)(C)[C@@H]1CCC(C)=C[C@@H]21, CCOC(=O)C(Br)CC to produce CCCCCc1cc(OCCCC(=O)O)c2c(c1)OC(C)(C)[C@@H]1CCC(C)=C[C@@H]21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.