Using Nc1nnn[nH]1, O=C(O)c1cnc2sc3ccccc3n2c1=O to produce O=C(Nc1nnn[nH]1)c1cnc2sc3ccccc3n2c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.