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The First Glycosides Isolated from Propolis: Diterpene Rhamnosides Milena Popova

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The First Glycosides Isolated from Propolis: Diterpene Rhamnosides

Milena Popova

a

, Vassya Bankova

a,

*, Iva Tsvetkova

b

, Christo Naydenski

b

and Mario Vides Silva

c

a Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria. E-mail: bankova@orgchm.bas.bg

b Institute of Microbiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

c Apiarios “Vides Silva”, El Salvador, Central America

* Author for correspondence and reprint request

Z. Naturforsch.56 c,1108Ð1111 (2001); received July 19/August 23, 2001 Propolis, Labdane Glycosides, Antibacterial Activity

Two diterpene glycosides,ent-8(17)-labden-15-O-α-l-rhamnoside andent-8(17)-labden-15- O-(3⬘-O-acetyl)-α-l-rhamnoside (new natural compounds) were isolated from propolis from El Salvador. The compounds showed significant antibacterial activity and moderate toxicity toArtemia salinanauplii. These are the first glycosides reported in bee glue.

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