... -ethyl-3,4,10-trihydroxy-13-[(2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyloxan-2-yl]oxy-3 ... ,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan- ... Formula: C38H72N2O12 Molecular Weight: 748.99 CAS Registry Number: 83905-01-5 Appearance : White crystalline powder Functions: Azithromycin is used for acute ...