title: Sesquiterpenoids from the rhizomes of Homalomena occulta.
abstract: Phytochemical investigation on the rhizomes of Homalomena occulta resulted in the isolation of five new sesquiterpenoids, namely cadinane-4β,5α,10α-triol (1), 5(11)-epoxycadinane-4β,5β,10β,11-tetraol (2), bullatantiol-1β-methyl malate (3), 1β,4β,7α-trihydroxyeudesmane-1β-methyl malate (6), and 1β,4α,7-trihydroxyeudes-mane (7), together with five known sesquiterpenoids, bullatantriol (4), acetylbullatantriol (5), 1β,4β,7α-trihydroxyeudesmane (8), 1β,4β,7β-trihydroxyeude-smane (9), and pterodontriol (10). Their structures were elucidated on the basis of spectroscopic evidences, including various 1D and 2D NMR and HR-ESI-MS. The structure of 1 was further confirmed by single-crystal X-ray diffraction analysis.
authors.affiliation: Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, PR China.
authors.forename: Xiao-Yu
authors.initials: XY
authors.lastname: Xie
authors.forename: Rui
authors.initials: R
authors.lastname: Wang
authors.forename: Yan-Ping
authors.initials: YP
authors.lastname: Shi
mesh_terms: D029064:Araceae / Q000737:chemistry*; D005591:Chemical Fractionation / Q000379:methods; D000431:Ethanol / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D027343:Rhizome / Q000737:chemistry*; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification*; D014961:X-Ray Diffraction / Q000379:methods
chemical_list: D012717:Sesquiterpenes; D000431:Ethanol