title: New triterpenoids isolated from the root bark of Ulmus pumila L.
abstract: Three new triterpenoids, 1-3, were isolated from the dried root bark of Ulmus pumila. Along with the three new compounds, six known triterpenoids, epifriedelanol (4), friedelin (5), oleanolic acid (6), maslinic acid (7), camaldulenic acid (8), and arjunolic acid (9) were also isolated. The structures of new compounds were established as ulmudiol (bauer-7-ene-1alpha,3beta-diol, 1), dehydroulmudiol [bauer-7,9(11)-diene-1alpha,3beta-diol, 2], and ulmuestone [3alpha-hydroxy-11alpha-(4'-hydroxy-3'-methoxy)benzoyloxybauer-1-one, 3], on the basis of extensive 1D and 2D NMR spectroscopic data interpretation. In addition, the cytotoxic activities of these compounds are also reported.
authors.affiliation: Department of Pharmacognosy, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Wang
authors.forename: Mingyu
authors.initials: M
authors.lastname: Xia
authors.forename: Zheng
authors.initials: Z
authors.lastname: Cui
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D015394:Molecular Structure; D009828:Oleanolic Acid / Q000031:analogs & derivatives / Q000302:isolation & purification; D024301:Plant Bark / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared; D013329:Structure-Activity Relationship; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*; D034403:Ulmus / Q000737:chemistry*; D000094042:Lupanes
chemical_list: D004365:Drugs, Chinese Herbal; D009828:Oleanolic Acid; D010936:Plant Extracts; D014315:Triterpenes; C061640:arjunolic acid; C055670:friedelinol; C060796:friedelin; D000094042:Lupanes