Using CCS(=O)(=O)c1ccc(-c2ccc(C3CCN(C(=O)OC(C)(C)C)CC3)nc2)cc1 to produce CCS(=O)(=O)c1ccc(-c2ccc(C3CCNCC3)nc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.