1982 Volume 35 Issue 5 Pages 594-601
The structures of 16, 17-dihydrorifamycin S and 16, 17-dihydro-17-hydroxyrifamycin S, two novel ansamycins from the recombinant strain C 5/42 of Nocardia mediterranei, were elucidated by physico-chemical methods. In addition structure-activity relationships among 16, 17-hydrogenated rifamycins are discussed.