Using N=C(N)Nc1ccc(C(=O)O)c(-c2ccc([N+](=O)[O-])cc2)c1, COC(=O)CCc1ccc(CCN)cc1 to produce COC(=O)CCc1ccc(CCNC(=O)c2ccc(NC(=N)N)cc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.