Minor and trace sterols in marine invertebrates. 62. novel coprostanols with unusual side chains from the marine sponge Calyx nicaeensis
โ Scribed by T.B.Tam Ha; Carl Djerassi
- Book ID
- 116065364
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 505 KB
- Volume
- 53
- Category
- Article
- ISSN
- 0039-128X
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The isolation, structure determination and synthesis of three novel sterols with unusual side chains is reported. A consistent scheme is proposed which accounts for the biosynthesis of all major and minor sterols in this sponge. ## Recently , 3-5 we recorded the structure elucidation of several
tero, fp!?.x A new cyclopropyl-containing sterol papakusterol (22-dehydro-24,26-cyclocholes- arising by a hitherto unknown bios nthetic process, was isolated from six "deep sea" gorgonians and its structure elucidated by Y H-NMR analysis and partial synthesis. Traces of the corresponding A5v7-diene