Using CS(=O)(=O)OCCN(CCC1C(=O)Nc2ccccc21)C(=O)OCc1ccccc1 to produce O=C(OCc1ccccc1)N1CCC2(CC1)C(=O)Nc1ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.