Any of a group of antibiotics; a sulfa drug
Any amide of a sulfonic acid RS(=O)₂NR'₂
Any of a large group of antibiotics with the same general structure derived from tetracene with many hydroxyl and other groups.
A yellow crystalline broad-spectrum antibiotic C₂₂H₂₄N₂O₈ produced by streptomyces or synthetically.