N’-(desmethyl)azithromycin (CP-64434 hydrate) is the metabolite of azithromycin. Azithromycin is an effective therapeutic agent for oral treatment of sexually transmitted diseases, upper and lower respiratory tract infections, and skin and skin structure infections. 0.1 and 7.6% of azithromycin dose are excreted as N’-(desmethyl)azithromycin during a day in urine and feces, respectively. 2.9% of dose - biliary excretion.

Azaerythromycin A is a novel intermediate of Azithromycin which acts as an antibiotic. Azithromycin binds to the 50S subunit of the bacterial ribosome, and thus inhibits translation of mRNA.