Using COC(=O)c1cc2c([nH]1)C(Cc1cccc(Cl)c1)CC2 to produce O=C(O)c1cc2c([nH]1)C(Cc1cccc(Cl)c1)CC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.