title: Complete assignments of (1)H and (13)C NMR data for two new sesquiterpenes from Cyperus rotundus L.
abstract: 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).
authors.affiliation: Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, PR China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Xu
authors.forename: Hong-Wu
authors.initials: HW
authors.lastname: Zhang
authors.forename: Xiao-Chun
authors.initials: XC
authors.lastname: Wan
authors.forename: Zhong-Mei
authors.initials: ZM
authors.lastname: Zou
mesh_terms: D002247:Carbon Isotopes; D029786:Cyperus / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods* / Q000592:standards; D008958:Models, Molecular; D008968:Molecular Conformation; D011522:Protons; D012015:Reference Standards; D012717:Sesquiterpenes / Q000737:chemistry* / Q000302:isolation & purification; D013237:Stereoisomerism
chemical_list: D002247:Carbon Isotopes; D011522:Protons; D012717:Sesquiterpenes; C519558:cyperenoic acid; C541832:cyperotundone; C541829:epi-guaidiol A; C541830:sugebiol; C541831:sugetriol triacetate