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Seven new alkaloids, kuroshines C–G (1–5), 3β-hydroxyzoanthenamide (6), 7α-hydroxyzoanthenamide (7), along with a known compound, zoanthenamine (8), were isolated from the ethanolic extract of Formosan zoanthid Zoanthus kuroshio. Kuroshines C–G (1–5) are alkaloids possess a densely functionalized ring system on the basis of the zoanthamine framework, and compounds 6 and 7 may be categorized as zoanthenamide...
A chemical investigation of Zoanthus kuroshio has yielded two new alkaloids, kuroshines A (1) and B (2). The compounds possess a densely functionalized ring system on the basis of the zoanthamine frames. The structures of 1 and 2 were elucidated through interpretation of spectroscopic methods, especially 2D NMR techniques (COSY, HMQC, HMBC, and ROESY). The absolute stereochemistry of 1 was further...
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