Complete  1 H and  13 C NMR assignments of two phytosterols from roots of  Piper nigrum | Zendy

Wei Kun | Zendy; Li Wei | Zendy; Koike Kazuo | Zendy; Pei Yuping | Zendy; Chen Yingjie | Zendy; Nikaido Tamotsu | Zendy

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Complete 1 H and 13 C NMR assignments of two phytosterols from roots of Piper nigrum

Author(s) -

Wei Kun,

Li Wei,

Koike Kazuo,

Pei Yuping,

Chen Yingjie,

Nikaido Tamotsu

Publication year - 2004

Publication title -

magnetic resonance in chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.483

H-Index - 72

eISSN - 1097-458X

pISSN - 0749-1581

DOI - 10.1002/mrc.1347

Subject(s) - piperaceae , chemistry , piper , two dimensional nuclear magnetic resonance spectroscopy , stereochemistry , proton nmr , dept , carbon 13 nmr , botany , biology

Using modern NMR techniques, including DQF‐COSY, NOESY, HETCOR and HMBC, the full assignments of all 1 H and 13 C chemical shifts were made for stigmastane‐3,6‐dione and stigmast‐4‐ene‐3,6‐dione, isolated from the roots of Piper nigrum (Piperaceae). Their stereochemistry was resolved by a combination of 2D NOESY data and analysis of coupling constants. The two compounds were isolated from the genus Piper for the first time. Copyright © 2004 John Wiley & Sons, Ltd.

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