Metabolic products of microorganisms. 240 Urdamycins, new angucycline antibiotics from Streptomyces fradiae. II Structural studies of urdamycins B to F.
- 1 January 1987
- journal article
- research article
- Published by Japan Antibiotics Research Association in The Journal of Antibiotics
- Vol. 40 (4) , 459-467
- https://doi.org/10.7164/antibiotics.40.459
Abstract
The structures of the angucycline antibiotics urdamycin B (5), E (2) and F (9) were established by comparing of their spectra with those of urdamycin A (1). The structures of urdamycins C and D, the largest compounds of this series, are still incomplete (10 and 11). The aglycones urdamycinone C, D and E can be liberated by methanolysis of the corresponding urdamycins. The liberation of urdamycinone B (6) requires an alcohol-free medium, to prevent its rearrangement to the naphthacenequinone 7 or 8. The urdamycins differ from other O-glycoside series in their variety of aglycones.This publication has 2 references indexed in Scilit:
- Metabolic products of microorganisms. 234 Urdamycins, new angucycline antibiotics from Streptomyces fradiae. I Isolation, characterization and biological properties.The Journal of Antibiotics, 1986
- Studies on the structure of olivomycin a and mithramycin by 1H and 13C nuclear magnetic resonance spectroscopyTetrahedron, 1981