API
IMPURITY
CHEMICAL NAME
STRUCTURE
2
Azithromycin

EP Impurity A

6-demethylazithromycin Azithromycin_EP-Impurity-A
Azithromycin

EP Impurity B

3-deoxyazithromycin
Azithromycin

EP Impurity E

3?-(N,N-didemethyl)azithromycin (aminoazithromycin)
Azithromycin

EP Impurity F

3?-N-demethyl-3?Nformylazithromycin Azithromycin_EP-Impurity-F
Azithromycin

EP Impurity G

3?-N-demethyl-3?-N-[(4-methylphenyl)sulphonyl]azithromycin
Azithromycin

EP Impurity H

3?N[[4(acetylamino)phenyl]sulphonyl]-3?-N-demethylazithromycin
Azithromycin

EP Impurity I

3-N-demethylazithromycin Azithromycin_EP-Impurity-I
Azithromycin

EP Impurity J

13-O-decladinosylazithromycin Azithromycin_EP-Impurity-J
Azithromycin

EP Impurity L

Azithromycin 3?- N-oxide
Azithromycin

EP Impurity M

3?-(N,N-didemethyl)-3?-N-formylazithromycin
Azithromycin

EP Impurity N

3?-de(dimethylamino)-3?-oxoazithromycin
Azithromycine

Azithromycine IMPURITY-1

3’-N-{[4-(Acetylamino)phenyl]sulfonyl}-3’,3’-didemethylazithromycin 19
Azithromycine

EP Impurity N

Azithromycine qwrtertertetert 19
Azithromycine

Azithromycine Impurity C

3′-O-demethylazithromycin 20
Azithromycine

Azithromycine Impurity O

2-desethyl-2-propylazithromycin 21
Azithromycine

Azithromycine Impurity P

(2R,3S,4S,5R,8R,10R,11R,12S,13S,14R)-13-(((2R,4R,5S,6S)- 4,5-dimethoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)- 11-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-2-ethyl-10-hydroxy- 4-methoxy-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one 22
AZITHROMYCIN IMPURITY D

AZITHROMYCIN IMPURITY D

14-demethyl-14-(hydroxymethyl)azithromycin azithromicin
Azithromycin Impurity K

Azithromycin Impurity K

C14, 1″-Epoxy Azithromycin (Azithromycin K) azi11