Explanatory notes
… Chemically modified antibiotics used as such. These may be prepared by isolating ingredients produced by natural … (INN), florfenicol (INN) and sirpefenicol (INN). (5) Macrolides , e.g., erythromycin*, amphotericin B, tylosin. … very low antibiotic activity, used as intermediates in the manufacture of antibiotics ( earlier headings of this …