## Abstract The crystal structure of axillarine hydrobromide ethanol solvate has been determined from analysis of photographic X‐ray data. The crystal system is orthorhombic, space group P2~1~2~1~2~1~, with unit cell dimensions __a__ = 9.89, __b__ = 11.23, __c__ = 20.83 Å. The structure was determi
Crystal Structure of N-methyl Crotananinium Iodide — A Pyrrolizidine Alkaloid
✍ Scribed by S. D. Sharma; V. M. Padmanabhan; K. N. Goswami; Vivek K. Gupta
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 348 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0232-1300
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## Abstract 1,2‐Didehydrocrotalanine (**2**) is the first synthetic macrocyclic pyrrolizidine alkaloid analogue to be studied by X‐ray crystallography. The crystal structure was solved by multisolution direct methods and refined by full‐matrix least‐squares to __R__ = 0.036 for 693 reflections. The
Sceleratine [l] and its N-oxide [Z] have been isolated from Senecio ZatifoZius DC and their structures determined by spectroscopic and chemical methods and X-ray crystal= lography. Recently we isolated the N-oxide of merenskine [3],' a new pyrrolizidine alkaloid N-oxide from Senecio Zatifolius DC.'