The Structure of Asperuloside

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.…”

Iridoids of Mentzelia decapetala (Pursh). I. Mentzeloside

“…spectra (A,,, 204 nm) indicated the presence of an en01 ether function (2). 1 gave black polymers on acid treatment, a property which has been shown to be characteristic of most iridoid compounds (3,4). The latter designation gained further support by the presence of a one-proton signal at 6.13 p.p.m.…”

Chemical Examination of Anacardium occidentale

“…Occidentoside (III) and its monomethyl ether (VIII), on acetylation, furnished a hexaacetate (IX) and a pentaacetate (X) respectively. The PMR spectra (CDC13) of these two acetates showed very close resemblance and revealed in both, the presence of six and five acetoxyl groups (7.72-8.00) respectively and C1-C6 protons of the glucose moiety as large multiplets [28] between 4.62 and 6.20. The presence of the two low field protons could be inferred in each acetate as in the two methyl ethers by the bathochro-OH2 L :0 mic shifts on addition of A1C13 to the test solution, (1) hexaacetate: (a) 281 -316 nm (A-5), (b) 366-* 419 nm (D-6"), (2) pentaacetate: (a) 284-321 nm (A- 5), (b) 375 -430 nm (D-6").…”