Using OCCO, O=C1CCCC1Oc1cc(N2C(=O)C3=C(CCCC3)C2=O)ccc1Br to produce O=C1C2=C(CCCC2)C(=O)N1c1ccc(Br)c(OC2CCCC23OCCO3)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.