Using COC(=O)c1ccc(C=O)cc1, C[P+](c1ccccc1)(c1ccccc1)c1ccccc1C=O to produce COC(=O)c1ccc(C=CC=O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.