Erythromycin
C37H67NO13
733.94
Erythromycin A
(3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-4-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-α-l-ribo-hexopyranosyl)oxy]-14-ethyl-7,12,13-trihydroxy-3,5,7,9,11,13-hexamethyl-6-[(3,4,6-trideoxy-3-dimethylamino-β-d-xylo-hexopyranosyl)oxy]oxacyclotetradecane-2,10-dione;
C37H67NO12 717.94
Erythromycin B
(3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-4-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-α-l-ribo-hexopyranosyl)oxy]-14-ethyl-7,12-dihydroxy-3,5,7,9,11,13-hexamethyl-6-[(3,4,6-trideoxy-3-dimethylamino-β-d-xylo-hexopyranosyl)oxy]oxacyclotetradecane-2,10-dione;
12-Deoxyerythromycin
[527-75-3] C36H65NO13 719.91
Erythromycin C
(3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-4-[(2,6-Dideoxy-3-C-methyl-α-l-ribo-hexopyranosyl)oxy]-14-ethyl-7,12,13-trihydroxy-3,5,7,9,11,13-hexamethyl-6-[(3,4,6-trideoxy-3-dimethylamino-β-d-xylo-hexopyranosyl)oxy]oxacyclotetradecane-2,10-dione;
3”-O-Demethylerythromycin
[1675-02-1] Erythromycin
[114-07-8]
Erythromycin A
(3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-4-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-α-l-ribo-hexopyranosyl)oxy]-14-ethyl-7,12,13-trihydroxy-3,5,7,9,11,13-hexamethyl-6-[(3,4,6-trideoxy-3-dimethylamino-β-d-xylo-hexopyranosyl)oxy]oxacyclotetradecane-2,10-dione;
C37H67NO12 717.94
Erythromycin B
(3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-4-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-α-l-ribo-hexopyranosyl)oxy]-14-ethyl-7,12-dihydroxy-3,5,7,9,11,13-hexamethyl-6-[(3,4,6-trideoxy-3-dimethylamino-β-d-xylo-hexopyranosyl)oxy]oxacyclotetradecane-2,10-dione;
12-Deoxyerythromycin
[527-75-3] C36H65NO13 719.91
Erythromycin C
(3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-4-[(2,6-Dideoxy-3-C-methyl-α-l-ribo-hexopyranosyl)oxy]-14-ethyl-7,12,13-trihydroxy-3,5,7,9,11,13-hexamethyl-6-[(3,4,6-trideoxy-3-dimethylamino-β-d-xylo-hexopyranosyl)oxy]oxacyclotetradecane-2,10-dione;
3”-O-Demethylerythromycin
[1675-02-1] Erythromycin
[114-07-8]
DEFINITION
Erythromycin consists primarily of erythromycin A (C37H67NO13). The sum of the percentages of erythromycin A, erythromycin B, and erythromycin C is NLT 93.0% and NMT 102.0%, calculated on the anhydrous basis.
USP REFERENCE STANDARDS FOR PURCHASE
USP Erythromycin RSUSP Erythromycin System Suitability Mixture RS
USP Erythromycin B RS
USP Erythromycin C RS