Sulfaphenazole (or sulfafenazol) is a sulfonamide antibacterial.[1]

References

  1. ^ Browne SG (1961). "Trial of a long-acting sulfonamide sulfaphenazole (Orisul, Ciba), in the treatment of leprosy". International Journal of Leprosy. 29: 502–5. PMID 13873771.
source: https://en.wikipedia.org/wiki/Sulfafenazol