New physostigmine related bromoalkaloids from the marine bryozoan Flustrafoliacea
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چکیده
منابع مشابه
New Cytotoxic Oxygenated Sterols from the Marine Bryozoan Cryptosula pallasiana
Six new sterols (1-6), together with seven known sterols (7-13), were isolated from the CCl(4) extract of the marine bryozoan Cryptosula pallasiana, four (3-6) of which have already been reported as synthetic sterols. This is the first time that these compounds (3-6) are reported as natural sterols. The structures of the new compounds were determined on the basis of the extensive spectroscopic ...
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A new sterol, (23R)-methoxycholest-5,24-dien-3β-ol (1), two new ceramides, (2S,3R,4E,8E)-2-(tetradecanoylamino)-4,8-octadecadien-l,3-diol (6) and (2S,3R,2'R,4E,8E)-2-(tetradecanoylamino)-4,8-octadecadien-l,3,2'-triol (7), together with three known sterols (2-4), a lactone (5) and two ceramides (8,9), were isolated from the marine bryozoan Cryptosula pallasiana, collected at Huang Island of Chin...
متن کاملAsexual propagation in the marine bryozoan Cupuladria exfragminis
Colonies of the free-living bryozoan Cupuladria exfragminis [Herrera-Cubilla, A., Dick, M.H., Sanner, J., Jackson, J.B.C., 2006. Neogene Cupuladriidae of Tropical America. I:. Taxonomy of Recent Cupuladria from opposite sides of the Isthmus of Panama. Journal of Paleontology. 80, 245–263.] from the Gulf of Panama are observed to separate into viable fragments without external force. The process...
متن کاملNeritinaceramides A–E, New Ceramides from the Marine Bryozoan Bugula neritina Inhabiting South China Sea and Their Cytotoxicity
Five new ceramides, neritinaceramides A (1), B (2), C (3), D (4) and E (5), together with six known ceramides (6-11), two known alkyl glycerylethers (12 and 13) and a known nucleoside (14), were isolated from marine bryozoan Bugula neritina, which inhabits the South China Sea. The structures of the new compounds were elucidated as (2S,3R,3'S,4E,8E,10E)-2-(hexadecanoylamino)-4,8,10-octadecatrien...
متن کاملTotal syntheses of five indole alkaloids from the marine bryozoan Flustra foliacea.
A general, efficient, and conceptually new approach to the total syntheses of marine-derived indole alkaloids, including (+/-)-flustramines A (1) and B (2), (+/-)-flustramides A (3) and B (4), and (+/-)-debromoflustramine B (5), is outlined. The key step in the syntheses involves the conjugated addition of an organomagnesium species derived from prenyl bromide to 2-hydroxyindolenines. Compounds...
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ژورنال
عنوان ژورنال: Canadian Journal of Chemistry
سال: 1986
ISSN: 0008-4042,1480-3291
DOI: 10.1139/v86-218