Urdamycin C

Formula : C51-H60-O19
CAS : 104443-43-8 

Angucycline antibiotic from Streptomyces fradiae.

Urdamycin D

Formula :
CAS : 104443-44-9 

Angucycline antibiotic from Streptomyces fradiae.

Urdamycin E

Formula : C44-H58-O17-S
CAS : 104542-47-4 

Angucycline antibiotic isolated from Streptomyces fradiae strain Tu 2717.

Urdamycin F

Formula : C43-H58-O18
CAS : 104562-12-1 

Angucycline antibiotic from Streptomyces fradiae.