Using O=C(O)CCCBr, Cc1nc(N)sc1C(=O)NCc1ccccc1 to produce Cc1nc(NC(=O)CCCBr)sc1C(=O)NCc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.