Azithromycin
C38H72N2O12
749.00
C38H72N2O12·H2O 767.01
C38H72N2O12·2H2O 785.03
1-Oxa-6-azacyclopentadecan-15-one, 13-[(2,6-dideoxy-3-C-methyl-3-O-methyl-α-l-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-(dimethylamino)-β-d-xylo-hexopyranosyl]oxy]-, [2R-(2R*,3S*,4R*,5R*,8R*,10R*,11R*,12S*,13S*,14R*)];
(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-13-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-α-l-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-(dimethylamino)-β-d-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15-one;
9-Deoxo-9a-aza-9a-methyl-9a-homoerythromycin A
Anhydrous
[83905-01-5] Monohydrate
[121470-24-4] Dihydrate [117772-70-0]
C38H72N2O12·H2O 767.01
C38H72N2O12·2H2O 785.03
1-Oxa-6-azacyclopentadecan-15-one, 13-[(2,6-dideoxy-3-C-methyl-3-O-methyl-α-l-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-(dimethylamino)-β-d-xylo-hexopyranosyl]oxy]-, [2R-(2R*,3S*,4R*,5R*,8R*,10R*,11R*,12S*,13S*,14R*)];
(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-13-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-α-l-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-(dimethylamino)-β-d-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15-one;
9-Deoxo-9a-aza-9a-methyl-9a-homoerythromycin A
Anhydrous
[83905-01-5] Monohydrate
[121470-24-4] Dihydrate [117772-70-0]
DEFINITION
Azithromycin is anhydrous or contains 1 or 2 molecules of water of hydration. It contains the equivalent of NLT 945 µg/mg and NMT 1030 µg/mg of azithromycin (C38H72N2O12), calculated on the anhydrous basis.
USP REFERENCE STANDARDS FOR PURCHASE
USP Azaerythromycin A RSUSP Desosaminylazithromycin RS
USP Azithromycin RS
USP Azithromycin Related Compound F RS