Using CC(=O)C1CCN(c2nccnc2C2CN(c3ccc4ccccc4n3)C2)CC1 to produce CC(O)C1CCN(c2nccnc2C2CN(c3ccc4ccccc4n3)C2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.