Using Nc1nc2c(s1)CC(CC(=O)N1CCN(c3ccccn3)CC1)CC2 to produce Nc1nc2c(s1)CC(CCN1CCN(c3ccccn3)CC1)CC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.