title: New jatrophane diterpenoid esters from Euphorbia turczaninowii.
abstract: Five new (1-5) and one known (6) jatrophane diterpenoid esters were isolated from the ethanol extract of the whole herb of Euphorbia turczaninowii. Their structures were established by extensive spectroscopic methods. The absolute stereochemistry of 3 beta,5 alpha,8 alpha,15 beta-tetraacetoxy-7 beta-benzoyloxyjatropha-6(17),11E-dien-9,14-dione (1) was confirmed by a single-crystal X-ray analysis coupled with the exciton chirality circular dichroism method. Compounds 1-6 were inactive when evaluated both in a mouse ear inflammation assay and for cytotoxicity against the B16 mouse melanoma cell line.
authors.affiliation: Institute of Functional Biomolecules, School of Life Sciences, Nanjing University, Nanjing 210093, People's Republic of China.
authors.forename: L G
authors.initials: LG
authors.lastname: Liu
authors.forename: R X
authors.initials: RX
authors.lastname: Tan
mesh_terms: D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002855:Chromatography, Thin Layer; D018360:Crystallography, X-Ray; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004423:Ear; D019665:Euphorbiaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008546:Melanoma, Experimental; D051379:Mice; D008968:Molecular Conformation; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D014407:Tumor Cells, Cultured / Q000187:drug effects / Q000378:metabolism
chemical_list: C436667:3beta,5alpha,7beta,8alpha-pentaacetoxy-2alpha-benzoyloxyjatropha-6(17),11E-dien-9,14-dione; C436666:3beta,5alpha,8alpha,15beta-tetraacetoxy-7beta-benzoyloxyjatropha-6(17),11E-dien-9,14-dione; D000972:Antineoplastic Agents, Phytogenic; D004224:Diterpenes; D004365:Drugs, Chinese Herbal