Abstract
A chemical investigation of Australian soil-derived bacteria Actinomadura sp. S4S-00069B08 yielded eight new benzenoid ansamycins, goondansamycins A-H. Goondansamycins feature rare 1,4-benzoxazin-3-one or o-diamino-p-benzoquinone moieties and can exist as both aglycones or 9-O-α-glycosides of either d-rhodinose or d-amicetose. Structures were solved on the basis of detailed spectroscopy, including X-ray analysis.
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