title: Quinone-methide triterpenes and salaspermic acid from Kokoona ochracea.
abstract: Tingenone[1],20-hydroxy-20-epi-tingenone[2],celastrol[ 3], and salaspermic acid [4] have been isolated from Kokoona ochracea stem bark. The quinone-methide triterpenes 1-3 exhibited strong but non-specific in vitro cytotoxicity against P-388 murine lymphocytic leukemia cells and a panel of human cancer cell lines. Salaspermic acid [4] was not active in all the cancer cell lines used in this investigation. 13C-nmr spectra assignments for salaspermic acid have been accomplished through the application of 1D and 2D nmr spectral techniques, and 13C-nmr assignments for celastrol [3] have been revised.
authors.affiliation: Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago 60680.
authors.forename: O
authors.initials: O
authors.lastname: Ngassapa
authors.forename: D D
authors.initials: DD
authors.lastname: Soejarto
authors.forename: J M
authors.initials: JM
authors.lastname: Pezzuto
authors.forename: N R
authors.initials: NR
authors.lastname: Farnsworth
mesh_terms: D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000302:isolation & purification* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D007941:Leukemia P388 / Q000188:drug therapy; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D010679:Philippines; D010946:Plants, Medicinal / Q000737:chemistry*; D014315:Triterpenes / Q000302:isolation & purification* / Q000494:pharmacology; D014407:Tumor Cells, Cultured
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D014315:Triterpenes; C074717:salaspermic acid