Using CCS(=O)(=O)N1CCN(c2cnc(N)c(C(=O)O)n2)CC1, CNc1ccccc1N to produce CCS(=O)(=O)N1CCN(c2cnc(N)c(-c3nc4ccccc4n3C)n2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.