title: Capitulatin B, a new eudesmane derivative from Curculigo capitulata, and revised assignment of 13C NMR data of 6alpha,15alpha-epoxy-1beta,4beta-dihydroxyeudesmane.
abstract: A new eudesmane derivative named capitulatin B (1) along with 6alpha,15alpha-epoxy-1beta,4beta-dihydroxyeudesmane (2) has been isolated from the rhizomes of Curculigo capitulata. The structure of compound 1 was established as 4alpha,6alpha-epoxy-1beta-hydroxy-4beta-methyleudesmane, and the 13C NMR data of compound 2 was reassigned on the basis of the spectral data, including 1D and 2D NMR (HMQC, HMBC, COSY, ROESY).
authors.affiliation: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, Yunnan, China.
authors.forename: Ning
authors.initials: N
authors.lastname: Li
authors.forename: Ji-Jun
authors.initials: JJ
authors.lastname: Chen
authors.forename: Jun
authors.initials: J
authors.lastname: Zhou
mesh_terms: D031408:Curculigo / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D045787:Sesquiterpenes, Eudesmane / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C497565:4alpha,6alpha-epoxy-1beta-hydroxy-4beta-methyleudesmane; D045787:Sesquiterpenes, Eudesmane; C497560:capitulatin B