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Four new indolo‐sesquiterpenes – dixiamycins A (1) and B (2), oxiamycin (3), and chloroxiamycin (4) – were isolated from a marine‐derived Actinomycete and characterized, together with the known compound xiamycin A (5). Dixiamycins A (1) and B (2) are the first examples of atropisomerism of naturally occurring N‐N‐coupled atropo‐diastereomers, with a dimeric indolo‐sesquiterpene skeleton and a stereogenic...
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