title: An unusual lanostane-type triterpenoid, spiroinonotsuoxodiol, and other triterpenoids from Inonotus obliquus.
abstract: An unusual lanostane-type triterpenoid, spiroinonotsuoxodiol (1), and two lanostane-type triterpenoids, inonotsudiol A (2) and inonotsuoxodiol A (3), were isolated from the sclerotia of Inonotus obliquus. Their structures were determined to be (3S,7S,9R)-3,7-dihydroxy-7(8-->9)abeo-lanost-24-en-8-one (1), lanosta-8,24-dien-3beta,11beta-diol (2), and (22R)-3beta,22-dihydroxylanosta-8,24-dien-11-one (3) on the basis of NMR spectroscopy, including 1D and 2D ((1)H-(1)H COSY, NOESY, HMQC, HMBC) NMR, and FABMS. Compounds 1-3 showed moderate activity against cultured P388, L1210, HL-60 and KB cells.
authors.affiliation: Laboratory of Medicinal Chemistry, Osaka University of Pharmaceutical Sciences, Takatsuki, Osaka, Japan.
authors.forename: Noriko
authors.initials: N
authors.lastname: Handa
authors.forename: Takeshi
authors.initials: T
authors.lastname: Yamada
authors.forename: Reiko
authors.initials: R
authors.lastname: Tanaka
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D001487:Basidiomycota / Q000737:chemistry*; D004354:Drug Screening Assays, Antitumor; D018922:HL-60 Cells; D006801:Humans; D007624:KB Cells; D007810:Lanosterol / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D007939:Leukemia L1210; D007941:Leukemia P388; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular
chemical_list: D000970:Antineoplastic Agents; D007810:Lanosterol