Table 4. Results of in-vitro anti-cancer activity of N -(4-(quinoxalin-2-yl)amino)phenyl)substituted Table 4. Results of in-vitro anti-cancer activity of N -(4-(quinoxalin-2-yl)amino)phenyl)substituted benzene sulfonamide derivatives screened against three tumor cell lines. benzene sulfonamide derivatives screened against three tumor cell lines.