Using c1ccc([P+](CC2CCCC2)(c2ccccc2)c2ccccc2)cc1, COC(=O)C(=O)c1ccc(Cl)c(Cl)c1 to produce COC(=O)C(=CC1CCCC1)c1ccc(Cl)c(Cl)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.