Using COCn1cc(Br)sc1=Nc1cccc(CN2CCN(C(=O)c3ccccc3)CC2)n1 to produce O=C(c1ccccc1)N1CCN(Cc2cccc(Nc3ncc(Br)s3)n2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.