Using Cn1c(=O)n(C)c2cc(C=O)ccc21, NCCN1C(=O)c2ccccc2C1=O to produce Cn1c(=O)n(C)c2cc(C=NCCN3C(=O)c4ccccc4C3=O)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.