Using CCN=C=O, NCCc1cccc(-c2nc(=O)c3ccccc3s2)n1 to produce CCNC(=O)NCCc1cccc(-c2nc(=O)c3ccccc3s2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.