New Oleanane Saponins in Chenopodium quinoa
| Autor: | A. Dini, Gian Carlo Tenore, O. Schettino, Irene Dini |
|---|---|
| Přispěvatelé: | Dini, Irene, Tenore, GIAN CARLO, Schettino, Oreste, Dini, Antonio |
| Jazyk: | angličtina |
| Rok vydání: | 2001 |
| Předmět: |
chemistry.chemical_classification
biology Stereochemistry Saponin Phytolaccagenic acid General Chemistry Chenopodiaceae Saponins Spectrometry Mass Fast Atom Bombardment biology.organism_classification Chenopodium quinoa Hederagenin chemistry.chemical_compound Hydrolysis Triterpenoid Biochemistry chemistry Seeds General Agricultural and Biological Sciences Oleanane |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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