title: Mycobacterium tuberculosis growth inhibition by constituents of Sapium haematospermum.
abstract: Four novel compounds consisting of two new pimaranes, lecheronol A (1) and lecheronol B (2), an acylated cycloartane, 3-O-beta-lauroyl-cycloart-(23E)-en-25-ol (10), and a highly oxygenated novel chalconoid, alpha,beta,3,4,5,2',4',6'-octahydroxydihydrochalcone (12), were isolated along with seven known triterpene derivatives and three flavonol glucosides from Mycobacterium tuberculosis growth-inhibiting fractions of the CH(2)Cl(2)/MeOH (1:1) extract of the aerial parts of Sapium haematospermum. Compounds 1, 3 (3 alpha-hydroxyolean-12-ene), 8 [3 alpha-hydroxylup-20(29)-en], and 9 (cycloartanol) were found most active, with MIC values of 4, 12.2, 13.4, and 8 microg/mL, respectively. Cytotoxicity tests in Vero cells for compounds 1, 3, 8, and 9 gave IC(50) values of 104.8, 127.2, 127.2, and 102.4 microg/mL, respectively.
authors.affiliation: Department of Pharmacology and Toxicology, Division of Medicinal and Natural Products Chemistry, College of Pharmacy, University of Arizona, 1703 E. Mabel Street, Tucson, Arizona 85721-0207, USA.
authors.forename: Girma M
authors.initials: GM
authors.lastname: Woldemichael
authors.forename: Maria-Teresa
authors.initials: MT
authors.lastname: Gutierrez-Lugo
authors.forename: Scott G
authors.initials: SG
authors.lastname: Franzblau
authors.forename: Yuehong
authors.initials: Y
authors.lastname: Wang
authors.forename: Enrique
authors.initials: E
authors.lastname: Suarez
authors.forename: Barbara N
authors.initials: BN
authors.lastname: Timmermann
mesh_terms: D045784:Abietanes / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D000818:Animals; D000995:Antitubercular Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D001118:Argentina; D002522:Chlorocebus aethiops; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D020128:Inhibitory Concentration 50; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D009169:Mycobacterium tuberculosis / Q000187:drug effects*; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry*; D031287:Sapium / Q000737:chemistry*; D014709:Vero Cells
chemical_list: D045784:Abietanes; D000995:Antitubercular Agents; D004224:Diterpenes; C485167:lecheronol A; C485168:lecheronol B