Using CCN1CCN(c2nc(-c3ccc4c(c3)CCC4=O)cc3ccccc23)CC1 to produce CCN1CCN(c2nc(-c3ccc4c(c3)CCC4O)cc3ccccc23)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.