What have the chemists done to
avoid acid-instability ?
clarithromycin
6-methoxy
roxithromycin
Erythromycin A
 9-N-oxime
9-amino
erythromycylamine
dirithromycin
9-CH2, 9a-aza
azithromycin
15 atoms
acid stability
FARM2147
2/11/2004