SPL Set ID: 21b64a3f-2c95-1c1a-e063-6294a90a0ea0
1 drug(s) with this SPL Set ID
Erythromycin topical solution, USP 2% contains erythromycin, USP for topical dermatologic use. Erythromycin is a macrolide antibiotic produced from a strain of Saccaropolyspora erythraea (formerly Streptomyces erythreus ). It is a base and readily forms salts with acids. Chemically, erythromycin is: (3 R *,4 S *,5 S *,6 R *,7 R *,9 R *,11 R *,12 R *,13 S *,14 R *)-4-[(2,6-Dideoxy-3- C -methyl-3- 0 -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)-ß-D- xylo -hexopyranosyl]oxy]oxacyclotetradecane-2,10-dione. It has the following structural formula: Molecular Formula: C 37 H 67 NO 13 Molecular Weight: 733.94 Erythromycin, USP is a white or slightly yellow, crystalline powder that is soluble in water, alcohol, chloroform and in ether. Each mL of erythromycin topical solution, USP 2% contains 20 mg of erythromycin base in a vehicle consisting of alcohol (66%), citric acid, and propylene glycol. formula