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Isolation and Structure Elucidation of Two New Xanthones from Gentiana azurium Bunge (Fam. Gentianaceae)

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Isolation and Structure Elucidation of Two New Xanthones from Gentiana azurium Bunge (Fam. Gentianaceae)

O. Purev

a

, Kh. Oyun

a

, G. Odontuya

a

, A. M. Tankhaeva

a

, G. G. Nikolaeva

a

, Khalid M. Khan

b

, Syed Tasadaque Ali Shah

b

, and Wolfgang Voelter

c

a Institute of Chemistry and Chemical Technology, MAS, Ulaanbaatar-51, Mongolia

b HEJ Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi, Karachi-75270, Pakistan

c Abteilung für Physikalische Biochemie, Physiologisch-chemisches Institut der Universität, Hoppe-Seyler-Straße 4, D-72076 Tübingen, Germany

Reprint requests to Prof. Dr. Dr. h.c. Wolfgang Voelter.

Fax: +49(0)-70 71-29 33 48. E-mail: wolfgang.voelter@uni-tuebingen.de Dedicated to Prof. Viqar Uddin Ahmad on the occasion of his 60thbirthday Z. Naturforsch.57 b, 331Ð334 (2002); received November 27, 2001

Gentiana azuriumBunge, Gentianaceae, Xanthones

Two new natural xanthones, 1,3,5-trihydroxy-8-methoxyxanthone (1) and 3,5-dihydroxy-8- methoxy-1-O-β-D-glucopyranosyl xanthone (2) were isolated along with two known xan- thones from Gentiana azurium Bunge (Fam. Gentianaceae). Their structures were deter- mined on the basis of their spectral data.

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