Using O=C1CCCC(=O)C1, O=C(O)c1ccc(Br)c(OCC2CCC2)c1Br to produce O=C1C=C(OC(=O)c2ccc(Br)c(OCC3CCC3)c2Br)CCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.