2-(1-Pyrrolidinoacetylamino)-5(6)-phenylsulphonobenzimidazole
2-Acetamido-5(6)-(3-nitro-5-phenylsulphono)-benzimidazole
2-Chloroacetamido-5(6)-phenylsulphonobenzimidazole
2-amino-5(6)-benzenesulfonylbenzimidazole
2-Acetamido-5(6)-phenylsulphonobenzimidazole