Using COc1ccc2ncc(=O)n(CCC3CCC4(CC3)OCCO4)c2c1 to produce COc1ccc2ncc(=O)n(CCC3CCC(=O)CC3)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.