title: Dihydroagarofuranoid sesquiterpenes, a lignan derivative, a benzenoid, and antitubercular constituents from the stem of Microtropis japonica.
abstract: Four new compounds, including two new dihydroagarofuranoid sesquiterpenes, 8-benzoyloxymutangin (1) and 15-acetoxyorbiculin G (2), a new lignan derivative, 9,9'- O-di-(Z)-feruloyl-(-)-secoisolariciresinol (3), and a new benzenoid, 5'-methoxyevofolin B (4), have been isolated from the stem of Microtropis japonica, together with 20 known compounds (5- 24). 3-Ethoxy-4-hydroxybenzaldehyde (5) was identified from a natural source for the first time. The structures of these new compounds were determined through analyses of physical data. 15-Acetoxyorbiculin G (2), celahin C (6), and salasol A (7) exhibit antituberculosis activities (MICs < or = 39.6 microM) against Mycobacterium tuberculosis H 37Rv in vitro.
authors.affiliation: Graduate Institute of Pharmaceutical Technology, Tajen University, Pingtung 907, Taiwan, Republic of China. jjchen@mail.tajen.edu.tw
authors.forename: Jih-Jung
authors.initials: JJ
authors.lastname: Chen
authors.forename: Chang-Syun
authors.initials: CS
authors.lastname: Yang
authors.forename: Chien-Fang
authors.initials: CF
authors.lastname: Peng
authors.forename: Ih-Sheng
authors.initials: IS
authors.lastname: Chen
authors.forename: Chang-Ling
authors.initials: CL
authors.lastname: Miaw
mesh_terms: D000995:Antitubercular Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D001555:Benzene Derivatives / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D029753:Celastraceae / Q000737:chemistry*; D017705:Lignans / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D015394:Molecular Structure; D009169:Mycobacterium tuberculosis / Q000187:drug effects; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D013624:Taiwan
chemical_list: D000995:Antitubercular Agents; D001555:Benzene Derivatives; D017705:Lignans; D012717:Sesquiterpenes