Nine new angucycline glycosides designated urdamycins N1⁻N9 (⁻), together with two known congener urdamycins A () and B (), were obtained from a mangrove-derived subsp. SCSIO GJ056. The structures of new compounds were elucidated on the basis of extensive spectroscopic data analysis. The absolute configurations of ⁻ were assigned by electronic circular dichroism calculation method. Urdamycins N6 () and N9 () represent the first naturally occurring (5, 6)-angucycline glycosides, which are diastereomers of urdamycins N7 () and N8 (), respectively.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6025406 | PMC |
| http://dx.doi.org/10.3390/md16060185 | DOI Listing |
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