title: Lanostane-type triterpenoids from Diospyros discolor.
abstract: Four new lanostane-type triterpenes, 24-ethyl-3beta-methoxylanost-9(11)-en-25-ol (1), 3beta-methoxy-24-methylenelanost-9(11)-en-25-ol (2), 3beta-methoxy-25-methyl-24-methylenelanost-9(11)-en-21-ol (3) and 3beta-methoxy-24-methyllanosta-9(11),25-dien-24-ol (4) together with three known triterpenes, betulinaldehyde, betulinic acid methyl ester, and ursaldehyde have been isolated from the methanol extract of the twigs of Diospyros discolor. The structures of those new compounds were elucidated by spectroscopic methods.
authors.affiliation: Institute of Molecular Biology, National Chung Hsing University, Taichung, Taiwan.
authors.forename: Chiy-Rong
authors.initials: CR
authors.lastname: Chen
authors.forename: Chao-Wen
authors.initials: CW
authors.lastname: Cheng
authors.forename: Min-Hsiung
authors.initials: MH
authors.lastname: Pan
authors.forename: Yun-Wen
authors.initials: YW
authors.lastname: Liao
authors.forename: Chih-Ying
authors.initials: CY
authors.lastname: Tzeng
authors.forename: Chi-I
authors.initials: CI
authors.lastname: Chang
mesh_terms: D029788:Diospyros / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D014315:Triterpenes