3C-NMR: 87.2 ppm) indicated that 1 was a modified kaurenoid with the Me group at C(10) shifted to C(9) . It was, therefore, identified as the 10-hydroxy-13-methoxy-9methyl-1 5-oxo-20-norkaur-16-en-18-0ic acid y-lactone. Further 2D-NMR experiments (COSY, HMBC and HMQC) allowed us the full assignment
Carnosol. Crystal structure, absolute configuration, and spectroscopic properties of a diterpene
β Scribed by Michael Gajhede; Uffe Anthoni; Halfdan Per Nielsen; Erik Jonas Pedersen; Carsten Christophersen
- Publisher
- Springer
- Year
- 1990
- Tongue
- English
- Weight
- 579 KB
- Volume
- 20
- Category
- Article
- ISSN
- 1572-8854
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π SIMILAR VOLUMES
The crystal structure of the antibiotic hedamycin (1) has been solved by direct method and refined by least squares techniques to R=0.091 for 2289 of 2643 independent reflexions. Crystals of C4,HS,,N,0 are orthorhombic, space group P2,2,2' with lattice parameters a=24.239 (12), b=21.440 (lo), c=7.36
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