The solid and solution state conformation of yunnanin A, a cyclic heptapeptide, cyclo(-Gly-Tyr-Gly-Gly-Pro-Phe-Pro-), isolated from the roots of Stellariu yunnanensis were studied. The X-ray diffraction studies showed that the crystal of yunnanin A [orthorhombic form from a ethanol-methanol mixture,
Solid state structure and solution conformation of a macrobicyclic cyclophane
β Scribed by Vickie McKee; Ward T. Robinson; Debbie McDowell; Jane Nelson
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- French
- Weight
- 248 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0040-4039
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## Abstract The solidβstate and solution conformations of (+)βchelidonine (1), a biologically active alkaloid, were determined by Xβray diffraction and ^1^HβNMR spectroscopy, XβRay diffraction analysis revealed a conformer with B/C β__anti__βtypeβ __cis__ conjunction, a halfβchair of ring B, and a