Using O=C(O)CCCCCC[P+](c1ccccc1)(c1ccccc1)c1ccccc1, O=CCCCCCCCCBr to produce O=C(O)CCCCC/C=C\CCCCCCCCBr, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.