Illustrated Glossary of Organic Chemistry

Macrolide: Any of a series of natural products have a large-ring lactone bonded to one or more deoxysugar molecules. Some macrolides have useful antibiotic or antifungal properties, and are useful pharmaceuticals.

Molecular structure of erythromycin, a widely used macrolide antibiotic. Atoms of the large-ring lactone is shown in red, and the deoxysugars in blue.