Illustrated Glossary of Organic Chemistry

Prontosil: An azo dye and antibiotic. Prontosil is a prodrug; in vivo metabolism converts it into the sulfa drug sulfanilamide, the active antibiotic agent.


Molecular structure of Prontosil, a red diazo dye.
Lacks in vitro antibiotic activity.

In vivo metabolism converts Prontosil
into sulfanilamide, a sulfa drug
which is the active antibiotic.