Two new antioxidant bergenin derivatives from the stem of Rivea hypocrateriformis

Zamarrud; Iftikhar Ali; Hidayat Hussain; Viqar Uddin Ahmad; Muhammad Qaiser; Afroze Amyn; Faryal Vali Mohammad

doi:10.1016/j.fitote.2011.03.002

Two new antioxidant bergenin derivatives from the stem of Rivea hypocrateriformis

Fitoterapia. 2011 Jun;82(4):722-5. doi: 10.1016/j.fitote.2011.03.002. Epub 2011 Mar 22.

Authors

Zamarrud¹, Iftikhar Ali, Hidayat Hussain, Viqar Uddin Ahmad, Muhammad Qaiser, Afroze Amyn, Faryal Vali Mohammad

Affiliation

¹ Department of Botany, University of Karachi, Karachi-75270, Pakistan.

PMID: 21406219
DOI: 10.1016/j.fitote.2011.03.002

Abstract

Two new bergenin derivatives, named rivebergenin A and B (1, and 2), together with two known compounds, bergenin (3) and norbergenin (4) were isolated from the stem of Rivea hypocrateriformis (Desr.) Choisy. The structures of the new compound have been assigned from (1)H and (13)C NMR spectra, DEPT, and by 2D COSY, HMQC, and HMBC experiments. Compounds 1-4 showed the strong antioxidant activity.

MeSH terms

Antioxidants / isolation & purification*
Benzopyrans / chemistry
Benzopyrans / isolation & purification*
Convolvulaceae / chemistry*
Molecular Structure
Plant Stems / chemistry
Plants, Medicinal / chemistry

Substances

Antioxidants
Benzopyrans
rivebergenin A
rivebergenin B
bergenin