Using CCC=C1CCC(CC[P+](c2ccccc2)(c2ccccc2)c2ccccc2)CC1, CCCC1CCC(=O)CC1 to produce CCC=C1CCC(CC=C2CCC(CCC)CC2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.