LOGIN TO YOUR ACCOUNT

Username
Password
Remember Me
Or use your Academic/Social account:

CREATE AN ACCOUNT

Or use your Academic/Social account:

Congratulations!

You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.

Important!

Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message

CREATE AN ACCOUNT

Name:
Username:
Password:
Verify Password:
E-mail:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:
On Thursday 28/09/2017 and Friday 29/09/2017 due to system maintenance you might experience some downtimes to claim, search and validator services that will also affect the portal. We apologize for the inconvenience.
fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Publisher: Altai State University
Journal: Khimiia rastitel'nogo syr'ia (Chemistry of plant raw material)
Languages: Russian
Types: Article
Subjects: Hedera helix L., berries, triterpene glycosides, α-, β-hederin, pentaoside, Hedera helix L.; ягоды; тритерпеновые гликозиды; α-, β-гедерины; пентаозид
Was found the presence of four triterpene glycosides named with increasing of their polarity as glycosides A, B, C, D by thin layer chromatography in the extract of berries of common ivy (Hedera helix L.)  of the family Araliaceae. Using the method of fractional extraction from raw material are obtained two fractions: low polar (glycosides A and B) and polar (glycosides C and D). Total number of sums triterpene glycosides is 3,71%. Individual glycoside were isolated from respective fractions by adsorption column chromatography on silica gel. Glycoside A – composition С41Н66О11, M.P. 228–230 °C,  +17,8° (c 0,5; 80% ethanol); glycoside B – composition С41Н66О12, M.P. 236–238 °C,  +16,2° (c 0,7; 80% ethanol); glycoside C – composition С58Н94О25, M.P. 188–190 °C, +9° (c 0,1; 50% ethanol); glycoside D – composition С58Н94О26, M.P. 190–192 °C,  +7° (c 0,15; 50% ethanol). By classical chemical methods, IR spectroscopy and thin layer chromatography is established the identity of low-polarity biosides and chemical nature of the polar triterpene glycosides. Glycoside A has the chemical structure as 3-O-alpha-L-rhamnnopyranosyl-(1→2)-O-alpha-L-arabinopyranoside oleanolic acid and it is known glycoside β-hederin. Glycoside B has a similar carbon chain, and as aglycone contains hederagenin, was identified as α-hederin. Polar glycosides C and D are the pentaosides of hederagenin and oleanolic acid, respectively. The carbohydrate chains include: 2 moles of L-arabinose, one mole of D-glucose, D-galactose and L-rhamnose. Both glycosides are monodesmosides.
  • No references.
  • No related research data.
  • No similar publications.

Share - Bookmark

Cite this article