Complete 1H and 13C NMR assignments of sesquiterpene glucosides from Ixeris sonchifolia.

Four sesquiterpene glucosides were isolated from Ixeris sonchifolia Hance. The structure of a new compound (1) was assigned as 9beta-monohydroxy-2,12-dioxo-guaia-3,11(13)-dien-1alpha,5alpha,6beta,7alpha,9beta,10alphaH-12,6-olide-9-O-beta-D- glucopyranoside (ixerinoside). In addition, unambiguous and complete assignments of (1)H NMR chemical shifts for crepidiaside A (2), ixerin Z (3), and 11,13alpha-dihydroixerin Z (4) are presented. The assignments were achieved by two-dimensional NMR (gCOSY, gHSQC, gHMBC, NOESY) and one-dimensional nuclear Overhauser effect (NOE) experiments.

Na Z ，Cho JY ，Lee HJ ，Chung JH ，Park KD ，Lee YJ ，Shin SC ，Rim YS ，Park KH ，Moon JH ... -  《MAGNETIC RESONANCE IN CHEMISTRY》

A new sesquiterpene lactone glucoside from Ixeris sonchifolia.

Feng XZ ，Xu SX ，Dong M 《JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH》

Two new sesquiterpene lactones from Ixeris sonchifolia.

Song SJ ，Zhou LY ，Li LZ ，Gao PY ，Jia WW ，Peng Y ... -  《-》

A new sesquiterpene lactone glucoside with inhibitory effect on K562 cells from Ixeris sonchifolia (Bge) Hance.

He WF ，Xu BB ，Pan JC ，Lu JC ，Song SJ ，Xu SX ... -  《JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH》

Complete assignments of (1)H and (13)C NMR data for two new sesquiterpenes from Cyperus rotundus L.

Two new sesquiterpenes, epi-guaidiol A (1) and sugebiol (3), together with four known sesquiterpenes, guaidiol A(2), sugetriol triacetate (4), cyperenoic acid (5), and cyperotundone (6) were isolated from the rhizomes of Cyperus rotundus L. Their structures were identified by MS and NMR experiments, and the complete assignments of (1)H and (13)C NMR data for two new sesquiterpenes were obtained by the aid of two-dimensional (2D) NMR techniques, including HSQC, HMBC, (1)H-(1)HCOSY and nuclear overhauser enhancement spectroscopy(NOESY).

Xu Y ，Zhang HW ，Wan XC ，Zou ZM ... -  《-》