title: Euphane and tirucallane triterpenes from the roots of Euphorbia kansui and their in vitro effects on the cell division of Xenopus.
abstract: Four new euphane-type triterpenes, kansenone (1), kansenonol (3), 11-oxo-kansenonol (4), kansenol (5), and a new tirucallane-type triterpene, epi-kansenone (2), were isolated from a 60% EtOH extract of Euphorbia kansui, together with alpha-euphol. Their structures were elucidated on the basis of extensive analysis of their 1D and 2D NMR spectral data. This appears to be the first report of the natural occurrence of euphane/tirucallane-type triterpenes with a ketone at C-7. In vitro treatment of cultured individual Xenopus laevis cells at the blastular stage with 1-4 significantly arrested cleavage of the cells (10 microg/mL of each compound resulted in >50% cleavage arrest).
authors.affiliation: Department of Natural Products Chemistry, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District Shenyang 110016, People's Republic of China.
authors.forename: Li-Yan
authors.initials: LY
authors.lastname: Wang
authors.forename: Nai-Li
authors.initials: NL
authors.lastname: Wang
authors.forename: Xin-Sheng
authors.initials: XS
authors.lastname: Yao
authors.forename: Syohei
authors.initials: S
authors.lastname: Miyata
authors.forename: Susumu
authors.initials: S
authors.lastname: Kitanaka
mesh_terms: D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002455:Cell Division / Q000187:drug effects; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D028481:Euphorbia / Q000737:chemistry*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D014981:Xenopus / Q000196:embryology
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D004365:Drugs, Chinese Herbal; D014315:Triterpenes