## Abstract Together with five known sesquiterpenes, EtOH extraction of __Laurencia saitoi__ yielded four new compounds, including three sesquiterpenes and one norsesquiterpene derivative. Their structures and relative configurations were elucidated by spectroscopic methods, including 1D‐ and 2D‐NM
Isethionic acid from the marine red alga Ceramium flaccidum
✍ Scribed by Kevin D. Barrow; Robert J. King; Ulf Karsten
- Book ID
- 103338261
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 188 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0031-9422
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The gross structures of fragilamide and martensines A and B, the first basic indole alkaloids to be isolated from a marine eukaryotic plant, are reported. Martensia fragilis, a red alga belonging to the family Delesseriaceae, has a foul odor reminiscent of skatole.
## Abstract Four new halogenated sesquiterpenes, 10‐bromo‐3‐chloro‐2,7‐epoxychamigr‐9‐en‐8__α__‐ol (**1**), 2,10__β__‐dibromochamigra‐2,7‐dien‐9__α__‐ol (**2**), (9__S__)‐2‐bromo‐3‐chloro‐6,9‐epoxybisabola‐7(14),10‐diene (**3**), and (9__R__)‐2‐bromo‐3‐chloro‐6,9‐epoxybisabola‐7(14),10‐diene (**4**