Using COCC1C(NC(=O)CNC(=O)OCc2ccccc2)CC2CN(C(C)C)CC21 to produce COCC1C(NC(=O)CN)CC2CN(C(C)C)CC21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.