Table 2.

Structures of Macrolide Antibiotics.

Members in Ring	Compounds	Source	Example Structure
12	Methymycin	Streptomyces venezuelae	Methymycin
14	Erythromycin Pikromycin Oleandomycin	Saccharopolyspora erythraea Streptomyces venezuelae Streptomyces antibioticus	Erythromycin
15	Azithromycin	Erythromycin derivative	Azithromycin
16	Spiramycin Tylosin Josamycin	Streptomyces ambofaciens Streptomyces fradiae Streptomyces narbonensis	Josamycin