In vitro: |
Archives of Pharmacal Research, 2005, 28(10):1156-1160. | Iridoid glycosides isolated from Oldenlandia diffusa inhibit LDL-oxidation.[Reference: WebLink] | METHODS AND RESULTS:
An iridoid glycoside, oldenlandoside III ( 5 ) was isolated from the n -butanol fraction of methanol extracts of the aerial parts of Oldenlandia diffusa Roxb, along with six others previously characterized iridoid glycosides; geniposidic acid ( 1 ), Scandoside ( 2 ), feretoside ( 3 ), 10- O -benzoylScandoside methyl ester ( 4 ), asperulosidic acid ( 6 ) and deacetylasperulosidic acid ( 7 ).
CONCLUSIONS:
Compounds 1, 2 , and 7 inhibited LDL-oxidation, and showed 63.3±2.0, 62.2±1.6, and 63.8±1.5% inhibition, respectively, at a concentration of 20 μg/mL. | Zeitschrift für Naturforschung C, 2007, 62(7-8):597---602. | Iridoid glucosides with insecticidal activity from Galium melanantherum.[Reference: WebLink] | The insecticidal activity of the endemic species Galium melanantherum was evaluated against Crematogaster scutellaris ants and Kalotermes flavicollis termites.
METHODS AND RESULTS:
Iridoid glucosides 1-7 were isolated for the first time as metabolites of the investigated plant, along with the coumarin scopolin. The main components of the extract were found to be the non-acetylated iridoids: geniposidic acid (1), 10-hydroxyloganin (2), deacetyldaphylloside (3), monotropein (4), deacetylasperulosidic acid (5) and Scandoside (6), while asperulosidic acid (7) was present only in minute quantities. All isolated metabolites were identified on the basis of their spectral data.
CONCLUSIONS:
Laboratory bioassays revealed significant levels of toxicity for 1-4 against Kalotermes flavicollis termites and Crematogaster scutellaris ants. |
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