Using NCc1ccccc1, O=C1Nc2cccnc2N(C(=O)CCCl)c2ccccc21 to produce O=C1Nc2cccnc2N(C(=O)CCNCc2ccccc2)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.