✦ LIBER ✦

Complete NMR spectral assignments of two lactucin-type sesquiterpene lactone glycosides from Picris conyzoides

✍ Scribed by Klaudia Michalska; Edward Szneler; Wanda Kisiel

Publisher: John Wiley and Sons
Year: 2011
Tongue: English
Weight: 142 KB
Volume: 49
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.2801

No coin nor oath required. For personal study only.

✦ Synopsis

Complete ^1^H and ^13^C NMR signal assignments of two lactucin‐type sesquiterpene lactone glycosides, derivatives of 11β,13‐dihydrolactucin, isolated from roots of Picris conyzoides, were achieved by one‐ and two‐dimensional NMR experiments, allowing the correction of previously published data for cichorioside B and the structure elucidation of its new ester with 3‐hydroxy‐2‐methylpropanoic acid. In addition, seven known sesquiterpene lactones and three phenolic compounds were isolated from the plant material. Copyright © 2011 John Wiley & Sons, Ltd.

📜 SIMILAR VOLUMES

Structure elucidation and complete NMR s

Structure elucidation and complete NMR spectral assignments of two new sesquiterpene lactone xylosides from Lactuca triangulata

✍ Klaudia Michalska; Marek Żylewski; Wanda Kisiel 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 89 KB 👁 1 views

## Abstract Two new sesquiterpene lactone xylosides, derivatives of the guaianolides 9α‐hydroxyleucodin and 9α‐hydroxy‐11,13‐dehydroleucodin, were isolated from roots of __Lactuca triangulata__. Their structures were established on the basis of ^1^H and ^13^C NMR spectra, 2D NMR (HMQC, HMBC, COSY,

Structure elucidation and complete NMR s

Structure elucidation and complete NMR spectral assignments of a novel sesquiterpene glycoside from Ixeris sonchifolia

✍ Guan Ye; Jing-jing Fang; Ming-song Fan; Cheng-gang Huang 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 90 KB 👁 1 views

## Abstract A novel sesquiterpene glycoside was isolated from the whole plant of __Ixeris sonchifolia.__ The structure was established as 1(10)__E__‐4__Z__‐3α‐hydroxy‐germacra‐1(10),4,11(13)‐trien‐6, 12‐olide‐14‐__O__‐β‐D‐glucopyranoside (1) on the basis of spectroscopic techniques and chemical ana

Structure elucidation and complete NMR s

Structure elucidation and complete NMR spectral assignments of two new dammarane-type tetraglycosides from Panax quinquefolium

✍ Hai-Ping Jiang; Ying-Kun Qiu; Da-Ren Cheng; Ting-Guo Kang; De-Qiang Dou 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 153 KB 👁 1 views

## Abstract Two new saponins were isolated from leaves of __Panax quinquefolium__ and their structures were elucidated as 3β, 12β, 20__S__‐trihydroxy‐25‐methoxydammar‐23‐ene 3‐__O__‐{[β‐D‐glucopyranosyl(1→2)‐β‐D‐glucopyranosyl]‐20‐__O__‐[α‐L‐arabinopyranosyl(1→6)]‐β‐D‐glucopyranoside (1) and 3β, 20

Structure elucidation and complete NMR s

Structure elucidation and complete NMR spectral assignments of two new oleanane-type pentacyclic triterpenoid saponins from the husks of Xanthoceras sorbifolia Bunge

✍ Ying Guo; De-Qiang Dou; Ting-Guo Kang; Shi-Cheng Wang; Hai-Xue Kuang 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 176 KB 👁 1 views

## Abstract Two new saponins were isolated from husks of __Xanthoceras sorbifolia__ Bunge and their structures were elucidated as 3‐O‐[β‐D‐galactopyranosyl(1→2)]‐α‐L‐arabinofuranosyl(1→3)‐β‐D‐methyl glucuronic acid‐21‐O‐(3,4‐diangeloyl)‐α‐L‐rhamnose‐3β, 16α, 21β, 22α, 28β‐pentahydroxyl‐22‐acetoxy‐o