Cyclosquamosins A – G, cyclic peptides from the seeds of Annona squamosa
✍ Scribed by Hiroshi Morita; Yumiko Sato; Jun'ichi Kobayashi
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- French
- Weight
- 581 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0040-4020
No coin nor oath required. For personal study only.
✦ Synopsis
Seven new cyclic peptides, cyclosquamosins A -G (1 -7), have been isolated from the seeds of Annona squamosa. Their structures and conformation of cyclosquamosin A in solution were elucidated by extensive 2D NMR methods and chemical degradation.
📜 SIMILAR VOLUMES
## Abstract Annosqualine (=(10′b__R__)‐1′,5′,6′,10′b‐tetrahydro‐9′‐hydroxy‐7′,8′‐dimethoxyspiro[cyclohexa‐2,5‐diene‐1,2′‐pyrrolo[2,1‐__a__]isoquinoline]‐3′,4‐dione; **1**), a novel alkaloid with an unprecedented skeleton, and a new amide, dihydrosinapoyltyramine (=3‐(4‐hydroxy‐3,5‐dimethoxyphenyl)‐
## Abstract Two new polar lignans, __i.e.__, squadinorlignoside (= 4‐[(1__E__)‐1‐(hydroxymethyl)‐3‐(4‐hydroxyphenyl)prop‐1‐en‐1‐yl]phenyl __β__‐D‐glucopyranoside; **1**) and (6__R__,7__R__,8__S__)‐7a‐[(__β__‐D‐glucopyranosyl)oxy]‐1‐methoxyisolariciresinol (**2**) were isolated from the stems of __A