Using O=C(O)CCC[P+](c1ccccc1)(c1ccccc1)c1ccccc1, COc1ccc(C(=O)c2ccc(OC)cc2)cc1 to produce COc1ccc(C(=CCCC(=O)O)c2ccc(OC)cc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.