Die iridoidglucoside aus paederia scandens (lour.) merrill var. mairei (léveillé) hara

An Iridoid Glucoside Dimer and a Non-glycosidic Iridoid from the Leaves of Lasianthus wallichii.

“…In the course of studies on the constituents of the plants which are grown under a subtropical climate, we investigated the constituents of the leaves of Lasianthus wallichii (WIGHT & ARN.) Wight (Rubiaceae) and isolated two new compounds, one of which is bisiridoid glucoside (1) and the other non-glycosidic iridoid (2), together with five known compounds: asperuloside (3), 4) paederoside (4), 5,6) daphylloside (5), 7) citroside A (6), 8) benzyl 6-O-a -L-rhamnopyranosyl-b -D-glucopyranoside (7). 9) This paper deals with the isolation and structure elucidation of the new compounds.…”

The Structural Transformation of Gardenoside and Its Related Iridoid Compounds by Acid and β-Glucosidase

“…In our experiment, deacetylasperuloside (2) was also obtained along with 4 and 6 by the neutralization procedure. The 13C-NMR spectrum (Table I) of 2 which was formed by the removal of methanol from 4 explains its structure well (6). The mass spectra of 4 and 6 showed similar fragment ions at m/z = 224,206,196,192,189 and 164, but the 13C-NMR spectrum of 4 at C-6 ( = 75.4 ppm) differs from that of 6 ( = 82.9 ppm).…”

“…Assignments maybe reversed. into two compounds; 6a-hydroxygeniposide (4) and 6-hydroxygeniposide (6). After cooling to the room temperature, the reaction mixture was neutralized with Amberlite IRA-410, filtered and chromatographed on a lobar column RP-8 using MeOH-H20 (2 : 58) as the eluent.…”

“…Major iridoid glycosides, isolated from Gardeniaejasminoides Ellis, were geniposide and gardenoside (1). Although geniposide is stable to weak acid and is transformed to genipin by the enzymatic hydrolysis (1,2), gardenoside (1) is easy to convert into 6a-hydroxygeniposide (deacetylasperulosidic acid methylester) (4) and 63-hydroxygeniposide (scandoside methyl ester) (6) by the treatment with hydrochloric acid (3).…”

The Dual Actions ofPaederia scandensExtract as a Hypouricemic Agent: Xanthine Oxidase Inhibitory Activity and Uricosuric Effect

“…1 have to be corrected as shown here. These compounds were isolated and identified as reported before [1], [2], [3], [4], [5].…”