title: Five new taraxerene-type triterpenes from the branch barks of Davidia involucrata.
abstract: Five new taraxerene-type triterpenes, 2-nor-D-friedoolean-14-en-28-ol (1), 2-nor-d-friedoolean-14-en-3α,28-diol (2), 6α-hydroxy-2-nor-D-friedoolean-14-en-3,21-dione (3), 6α,11α,29-trihydroxy-D-friedoolean-14-en-3,16,21-trione (4), and 6α,23,29-trihydroxy-D-friedoolean-14-en-3,16,21-trione (5), were isolated from the MeOH extract of the branch barks of Davidia involucrata, together with five known compounds. Their structures were elucidated by means of various spectroscopic analyses. Five of the identified compounds showed moderate cytotoxicities against the cell proliferation of SGC-7901, MCF-7, and BEL-7404.
authors.affiliation: Key Laboratory of Plant Virology of Fujian Province, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China. tanqingwei@fafu.edu.cn.
authors.forename: Qing-Wei
authors.initials: QW
authors.lastname: Tan
authors.affiliation: Key Laboratory of Plant Virology of Fujian Province, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China. maouyang@hqu.edu.cn.
authors.forename: Ming-An
authors.initials: MA
authors.lastname: Ouyang
authors.affiliation: Key Laboratory of Plant Virology of Fujian Province, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China. fafuchenqijian@163.com.
authors.forename: Qi-Jian
authors.initials: QJ
authors.lastname: Chen
authors.affiliation: Key Laboratory of Plant Virology of Fujian Province, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China. wuzujian@126.com.
authors.forename: Zu-Jian
authors.initials: ZJ
authors.lastname: Wu
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry* / Q000494:pharmacology; D045744:Cell Line, Tumor; D029767:Cornaceae / Q000737:chemistry*; D006801:Humans; D061986:MCF-7 Cells; D015394:Molecular Structure; D013057:Spectrum Analysis / Q000379:methods; D014315:Triterpenes / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D014315:Triterpenes