title: Cytotoxic alkaloids from the roots of Tylophora atrofolliculata.
abstract: Four new phenanthroindolizidine alkaloids, tylophoridicines C-F, together with three known ones, R-(+)-deoxytylophorinidine, tylophorinine and tylophorinidine, were isolated from the roots of Tylophora atrofolliculata. The structures were determined on the basis of spectral evidence. These alkaloids exhibited cytotoxic activity in vitro on HCT-8 cell (with IC50 values in the range 0.083 to 18.99 microM) and KB cell (in the range 3.56 to 18.22 microM) lines.
authors.affiliation: Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, PR China.
authors.forename: Xueshi
authors.initials: X
authors.lastname: Huang
authors.forename: Song
authors.initials: S
authors.lastname: Gao
authors.forename: Lihua
authors.initials: L
authors.lastname: Fan
authors.forename: Shishan
authors.initials: S
authors.lastname: Yu
authors.forename: Xiaotian
authors.initials: X
authors.lastname: Liang
mesh_terms: D000470:Alkaloids / Q000008:administration & dosage / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D000972:Antineoplastic Agents, Phytogenic / Q000008:administration & dosage / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D045744:Cell Line, Tumor / Q000187:drug effects; D006801:Humans; D020128:Inhibitory Concentration 50; D007624:KB Cells / Q000187:drug effects; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D018517:Plant Roots; D031110:Tylophora
chemical_list: D000470:Alkaloids; D000972:Antineoplastic Agents, Phytogenic; D010936:Plant Extracts