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Withanolides from Physalis coztomatl
被引:14
|作者:
Zhang, Huaping
[1
]
Cao, Cong-Mei
[1
]
Gallagher, Robert J.
[1
]
Day, Victor W.
[2
]
Kindscher, Kelly
[3
]
Timmermann, Barbara N.
[1
]
机构:
[1] Univ Kansas, Sch Pharm, Dept Med Chem, Lawrence, KS 66045 USA
[2] Univ Kansas, Smallmol Xray Crystallog Lab, Lawrence, KS 66045 USA
[3] Univ Kansas, Kansas Biol Survey, Lawrence, KS 66045 USA
来源:
基金:
美国国家科学基金会;
关键词:
Withanolide;
Physalis coztomatl;
Solanaceae;
Physacoztolide;
Structure revision;
Coagulansin A;
ANTIPROLIFERATIVE WITHANOLIDES;
D O I:
10.1016/j.phytochem.2014.10.012
中图分类号:
Q5 [生物化学];
Q7 [分子生物学];
学科分类号:
071010 ;
081704 ;
摘要:
Six withanolides (1-6), as well as two known withanolides (physachenolide D 7 and withanoside VI 8), were isolated from the aerial parts of Physalis coztomatl (Solanaceae). Structural elucidations of 1-6 were achieved through 2D NMR and other spectroscopic techniques, while the structure of 1 was confirmed by X-ray crystallographic analysis. In addition, the stereochemical orientation of the 17-hydroxy group in withanolides was discussed in relation to C-13 NMR shifts of C-12, 13, 14 and 16. Such analysis established that coagulansin A contains a 17 alpha-hydroxy moiety rather than the reported 17 beta-hydroxy functionality, and has been revised accordingly. (C) 2014 Elsevier Ltd. All rights reserved.
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页码:147 / 153
页数:7
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