Using O=C(Nc1ccc[n+](CCc2c[nH]c3ccccc23)c1)c1ccccc1 to produce O=C(NC1CCCN(CCc2c[nH]c3ccccc23)C1)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.