PubMed Health⌕ Search

Biomedical subjects

A Dini

Publications and source records attributed to A Dini.

13 recordsLinked to original sources
PubMed2001

Studies on the constituents of Chenopodium quinoa seeds: isolation and characterization of new triterpene saponins.

Six triterpenoid saponins were isolated from the edible grain quinoa, which is seeds of Chenopodium quinoa (Chenopodiaceae). Following are their structures: phytolaccagenic acid 3-O-[alpha-L-arabinopyranosyl-(1' '-->3')-beta-D-glucuronopyranosyl]-28-O-beta-D-glucopyranoside (1); phytolaccagenic acid 3-O-[beta-D-glucopyranosyl-(1' '-->3')-alpha-L-arabinopyranosyl]-28-O-beta-D-glucopyranoside (2); phytolaccagenic acid 3-O-[beta-D-glucopyranosyl-(1' "-->3' ')-beta-D-xylopyranosyl-(1' '-->2')-beta-D-glucopyranosyl]-28-O-beta-D-glucopyranoside (3); phytolaccagenic acid 3-O-[beta-D-glucopyranosyl-(1' "-->2' ')-beta-D-glucopyranosyl-(1' '-->3')-alpha-L-arabinopyranosyl]-28-O-beta-D-glucopyranoside (4); oleanolic acid 3-O-[alpha-L-arabinopyranosyl-(1' '-->3')-beta-D-glucuronopyranosyl]-28-O-beta-D-glucopyranoside (5); and oleanolic acid 3-O-[beta-D-glucopyranosyl-(1' '-->3')-alpha-L-arabinopyranosyl]-28-O-beta-D-glucopyranoside (6). The oleanane-type saponins (5, 6) were isolated for the first time in this plant, two of the phytolaccagenane (1, 3) were new compounds and two (2, 4) were previously found in quinoa. The structures were characterized on the basis of hydrolysis and spectral evidence, including 1D- and 2-D NMR (HMQC and HMBC) and ESI-MS analyses.

Carbohydrate Sequence↗
PubMed2001

New oleanane saponins in Chenopodium quinoa.

Six triterpenoid saponins were isolated from the seeds of Chenopodium quinoa (Chenopodiaceae). Their structures were as follows: phytolaccagenic acid 3-O-[alpha-L-arabinopyranosyl-(1' '-->3')-beta-D-glucuronopyranosyl]-28-O-beta-D-glucopyranoside (1); spergulagenic acid 3-O-[beta-D-glucopyranosyl-(1-->2)-beta-D-glucopyranosyl-(1-->3)-alpha-L-arabinopyranosyl-28-O-beta-D-glucopyranoside (2); hederagenin 3-O-[beta-D-glucopyranosyl-(1-->3)-alpha-L-arabinopyranosyl]-28-O-beta-D-glucopyranoside (3); phytolaccagenic acid 3-O-[beta-D-glucopyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->4)-beta-D-glucopyranosyl]-28-O-beta-D-glucopyranoside (4); hederagenin 3-O-[beta-D-glucopyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->4)-beta-D-glucopyranosyl]-28-O-beta-D-glucopyranoside (5); and spergulagenic acid 3-O-[alpha-L-arabinopyranosyl-(1' '-->3')-beta-D-glucuronopyranosyl]-28-O-beta-D-glucopyranoside (6). Saponins 5 and 6 are new. The structures were characterized on the basis of hydrolysis and spectral evidence, including IR, UV, optical rotations, 1D- and 2D-NMR (HMQC and HMBC), ESIMS, and FABMS analyses.

Chenopodiaceae↗
PubMed1991

Minor components in food plants--Note I. Flavonol glycosides from Ullucus tuberosus.

This work deals with the isolation and characterization in Ullucus tuberosus of flavonoids, a class of natural products influencing potentially the taste and nutritional value of the plant food. The three flavonoids, rutin, narcissin and kaempferol 3-O-(2",6"-di-O-alpha-L-rhamnopyranosil)-beta-D-glucopyranoside, isolated, are devoid of taste, but appear to possess health promoting effects.

Antioxidants↗
PubMed1991

[Minor components in food plants--II. Triterpenoid saponins from Ullucus tuberosus].

The present work deals with the isolation and characterization of triterpenoid saponins from Ullucus tuberosus. This class of natural products can account at least in part for unpalatability of the tubers of the plant. Two saponins were isolated 28-O-beta-D-glucopyranosyl-epihederagenine and 28-O-beta-D-glucopyranoside-3-O-beta-D-glucopyranosyl (1"-- 2')-beta-D-glucopyranosyl-oleanoate.

Ginsenosides↗
PubMed1990

Two flavonol glycosides from Chenopodium quinoa.

Two new flavonol glycosides from the seeds of Chenopodium quinoa have been isolated. Their structures were established as kaempferol 3-apiofuranosyl(1"'----2")rhamnopyranosyl(1""----6")galactoside and kaempferol 3-apiofuranosyl(1"'----2")rhamnopyranosyl(1""----6")galactoside. The main flavonoid glycoside was kaempferol 3-(2,6-dirhamnopyranosyl)galactoside.

Carbohydrate Sequence↗
PubMed1987

[Not Available].

Explore the source record for details and available documents.

Belgium↗
PubMed1985

[Chemical composition and biological properties of Erythraea centaurium Rafn].

The steroidic fraction from the ethereal extract of the aereal parts of Erythraea centaurium Rafn. has showed the presence of the following sterols: beta-sitosterol, stigmasterol, campesterol, brassicasterol and delta 7 stigmastenol, isolated by H.P.L.C. and identified by G.L.C., 1H-N.M.R. and MS. Then the free amino-acids from the aqueous extract of E. centaurium were determined.

Amino Acids↗
PubMed1984

Sterols from Equisetum arvense.

The sterol fraction of Equisetum arvense L. contains, essentially, the following sterols: beta-sitosterol (60.0%), campesterol (32.9%), isofucosterol (5.9%) and cholesterol (trace amounts). The identification of the compounds has been carried out through NMR and MS, while the corresponding percentage have been desumed from the GLC and HPLC data.

Cholesterol↗
PubMed1981

Candida albicans arthritis in a healthy adult.

Candida arthritis developed postoperatively in a healthy man in whom initial operative cultures had shown no infection. The possibility of iatrogenic infection with fungus should be considered.

Arthritis, Infectious↗
PubMed1980

Synthesis and anti-inflammatory activity of 4H-1,4-benzothiazines.

A new series of 4H-1,4-benzothiazine derivatives have been synthesized. These products were obtained by treatment with SO2Cl2 in dry ether at room temperature of 1,3-benzothiazolines N-acetylated. The 1,3-benzothiazolines were prepared by condensation in benzene of 2-aminothiophenol with several ketones, in the presence of p-toluenesulphonic acid as catalyst. Preliminary pharmacological studies on the anti-inflammatory activity of these compounds are reported.

Animals↗