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D Teborg

Publications and source records attributed to D Teborg.

2 recordsLinked to original sources
PubMed1991

Iridoid Glucosides from Penstemon nitidus.

From the leaves of PENSTEMON NITIDUS Dougl. (smooth blue beardtongue) besides the known iridoid glucosides cornin (syn. verbenalin), hastatoside and beta-dihydrohastatoside the new compound 10-hydroxycornin has been isolated. The structures of all compounds were established by spectroscopic means (FD-MS, (1)H-, (13)C-, 2D-NMR, and NOE). This is the first report of cornin and analogous 6-keto iridoids in scrophulariaceous plants. Up to now iridoid glucosides like these have only been found in plants belonging to the Cornaceae and its allies and to the Lamiaceae-Verbenaceae complex.

Journal Article↗
PubMed1991

5''-Hydroxydigipenstroside and Penstriatoside: Novel Dimeric and Trimeric Open-Chain Monoterpene Glucosides from Penstemon digitalis*.

A new dimeric open-chain monoterpene glucoside, 5''-hydroxydigipenstroside {1-beta- D-glucopyranosyl)-8-[5'',8''-dihydroxy-2'',6''-dimethyl-2''( E),6''( E)-octadienoyl]-5,8-dihydroxy-2,6-dimethyl-2( E),6( E)-octadienoate} has been isolated from leaves of PENSTEMON DIGITALIS Nutt. In addition, the novel trimeric open-chain monoterpene glucoside penstriatoside {1-(beta- D-glucopyranosyl)-8-[5'',8''-dihydroxy-2'',6''-dimethyl-2''( E),6''( E)-octadienoyl-8''-(5''',8'''-dihydroxy-2''',6'''-dimethyl-2''' ( E)6'''( E)-octadienoyl)]-5,8-dihydroxy-2,6-dimethyl-2 ( E),6( E)-octadienoate} has been encountered. The structures of both compounds have been elucidated by spectroscopic means (FD-, FAB-mass, (1)H-, (13)C-NMR, COSY, DEPT).

Journal Article↗