Using NCCc1c[nH]c2ccc(OCCCCN3C(=O)c4ccccc4C3=O)cc12 to produce NCCc1c[nH]c2ccc(OCCCCN3C(=O)c4ccccc4C3O)cc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.