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New antibiotics from the fungus Epicoccum nigrum. III. Epicorazine B: structure elucidation and absolute
The Journal of Antibiotics
|November 1, 1978
Abstract:
Comparison of UV, IR, PMR and CD spectra of epicorazine B with those of epicorazine A, a previously isolated metabolite of Epicoccum nigrum, showed that they were isomers with the same epidithiodiketopiperazine skeleton. X-Ray determination of epicorazine B indicated that the difference is related to a cis-trans configuration.