Using O=C(Cl)COc1ccc(C(=O)Nc2cccc(Cl)c2Cl)cc1, CCCCO to produce CCCCOC(=O)COc1ccc(C(=O)Nc2cccc(Cl)c2Cl)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.