Any of a group of antibiotic drugs structurally related to sulphonamide, tending to be bacteriostatic rather than bacteriocidal.
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.