title: Chamobtusin A, a novel skeleton diterpenoid alkaloid from Chamaecyparis obtusa cv. tetragon.
abstract: The novel diterpenoid alkaloid chamobtusin A (1) was isolated from the branches and leaves of Chamaecyparis obtusa cv. tetragon. Its structure and relative stereochemistry were mainly determined by MS, 2D NMR, and X-ray methods. The methanol extracts, total alkaloids of C. obtusa cv. tetragon, and chamobtusin A were tested for their cytotoxicities against A549 and K562 human tumor cell lines.
authors: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, Yunnan, P. R. China.
authors: Yu-Mei
authors: YM
authors: Zhang
authors: Ning-Hua
authors: NH
authors: Tan
authors: Yang
authors: Y
authors: Lu
authors: Ying
authors: Y
authors: Chang
authors: Rui-Rui
authors: RR
authors: Jia
mesh_terms: D000470:Alkaloids / Q000737:chemistry*; D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000494:pharmacology; D045744:Cell Line, Tumor; D029780:Chamaecyparis / Q000737:chemistry* / Q000145:classification; D004224:Diterpenes / Q000737:chemistry*; D004305:Dose-Response Relationship, Drug; D006801:Humans; D020128:Inhibitory Concentration 50; D008958:Models, Molecular; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry
chemical_list: D000470:Alkaloids; D000972:Antineoplastic Agents, Phytogenic; D004224:Diterpenes; C525487:chamobtusin A