Using CN1CCN(C(=O)c2ccc(-c3ccn4c(-c5ccc(CNC(=O)OC(C)(C)C)cc5)cnc4c3)cc2)CC1 to produce CN1CCN(C(=O)c2ccc(-c3ccn4c(-c5ccc(CN)cc5)cnc4c3)cc2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.