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Conolutinine, a hexacyclic indole alkaloid with a novel ring system incorporating a diazaspiro center and fused oxadiazepine–tetrahydrofuran rings

✍ Scribed by Kuan-Hon Lim; Tadahiro Etoh; Masahiko Hayashi; Kanki Komiyama; Toh-Seok Kam

Publisher
Elsevier Science
Year
2009
Tongue
French
Weight
166 KB
Volume
50
Category
Article
ISSN
0040-4039

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✦ Synopsis

A hexacyclic indole alkaloid possessing an unprecedented ring system incorporating a diazaspiro center and fused oxadiazepine-tetrahydrofuran rings has been isolated from the Malayan Tabernaemontana corymbosa. The structure was established by analysis of the spectroscopic data and a possible biogenetic pathway from a cleavamine-type precursor is presented.

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Leucolusine, a tetracyclic alkaloid with
Leucolusine, a tetracyclic alkaloid with a novel ring system incorporating an oxindole moiety and fused piperidine-tetrahydrofuran rings
✍ Chew-Yan Gan; Toh-Seok Kam 📂 Article 📅 2009 🏛 Elsevier Science 🌐 French ⚖ 290 KB

A tetracyclic ring-opened oxindole alkaloid, possessing an unprecedented ring system incorporating fused piperidine-tetrahydrofuran rings, has been isolated from the Malayan species, Leuconotis griffithii. The structure was established by analysis of the spectroscopic data and a possible biogenetic