Dapsone is a sulfone active against a wide range of bacteria but mainly employed for its actions against mycobacterium leprae.

Tylosin (Fradizine; Tylocine; Tylosin A) is a broad spectrum antibiotic against Gram-positive organisms and a limited range of Gram-negative organisms.

Potassium 7-hydroxy-1-naphthalenesulfona is naturally present in the fruit of the Rubiaceae gardenia, the flowers of the Iridaceae crocus, and the flowers and leaves of the Scrophulariaceae Scrophulariaceae.