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Structures of new polar steroids from the Far-Eastern starfishCtenodiscus crispatus

✍ Scribed by A. A. Kicha; N. V. Ivanchina; A. I. Kalinovsky; P. S. Dmitrenok; V. A. Stonik

Publisher: Springer
Year: 2005
Tongue: English
Weight: 275 KB
Volume: 54
Category: Article
ISSN: 1573-9171
DOI: 10.1007/s11172-005-0392-3

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## Abstract Two acetylenic steroids, cholest‐5‐en‐23‐yn‐3β‐ol (**5**) and 26,27‐dinorcholest‐5‐en‐23‐yn‐3β‐ol (**3**), and another unsaturated steroidalcohol, stigmasta‐5,23‐dien‐3β‐ol (**7**), were isolated from the sponge __Calyx nicaaensis__. The structures of these two acetylenic steroids were