Aporphine alkaloids of annona squamosa
โ Scribed by D.S. Bhakuni; Shobha Tewari; M.M. Dhar
- Book ID
- 103330661
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- English
- Weight
- 301 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0031-9422
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๐ SIMILAR VOLUMES
## Abstract Annosqualine (=(10โฒb__R__)โ1โฒ,5โฒ,6โฒ,10โฒbโtetrahydroโ9โฒโhydroxyโ7โฒ,8โฒโdimethoxyspiro[cyclohexaโ2,5โdieneโ1,2โฒโpyrrolo[2,1โ__a__]isoquinoline]โ3โฒ,4โdione; **1**), a novel alkaloid with an unprecedented skeleton, and a new amide, dihydrosinapoyltyramine (=3โ(4โhydroxyโ3,5โdimethoxyphenyl)โ
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.