Using O=Cc1cccc(Cl)c1Cl, COC(=O)C=P(c1ccccc1)(c1ccccc1)c1ccccc1 to produce COC=Cc1cccc(Cl)c1Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.