Using Cc1ccccc1C(=O)CN1C(=O)C(NC(=O)OC(C)(C)C)CN(C(=O)C(C)(C)C)c2ccccc21 to produce Cc1ccccc1C(=O)CN1C(=O)C(N)CN(C(=O)C(C)(C)C)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.