Using NCCc1c[nH]c2ccccc12, O=C(O)c1ccc2cccnc2c1O to produce O=C(NCCc1c[nH]c2ccccc12)c1ccc2cccnc2c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.