Using CN1CCN(c2ccc(C(=O)Nc3ccccc3NC(=O)OC(C)(C)C)cc2)CC1 to produce CN1CCN(c2ccc(C(=O)Nc3ccccc3N)cc2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.