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Structural determination of silymins A and B, new pentacyclic triterpenes from Silybum marianum, by 1D and 2D NMR spectroscopy.
Ahmed, Ejaz; tun Noor, Atia; Malik, Abdul; Ferheen, Sadia; Afza, Nighat.
Magn Reson Chem ; 45(1): 79-81, 2007 Jan.
Article in English | MEDLINE | ID: mdl-17091528

ABSTRACT

Silymins A (1) and B (2), the new pentacyclic triterpenes, have been isolated from ethyl acetate fraction of Silybum marianum and their structures assigned from 1H and 13C NMR spectra, DEPT and by 2D COSY, NOE and HMBC experiments.


Subject(s)
Silybum marianum/chemistry , Triterpenes/chemistry , Cyclization , Hydrogen , Magnetic Resonance Spectroscopy/methods , Reference Standards , Triterpenes/isolation & purification
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