title: Daturametelins H, I, and J: three new withanolide glycosides from Datura metel L.
abstract: Three new withanolide glycosides named daturametelins H-J (1-3), together with two known ones, daturataturin A (4) and 7,27-dihydroxy-1-oxowitha-2,5,24-trienolide (5), were isolated from the MeOH extract of the aerial parts of Datura metel L. (Solanaceae). Their structures were determined mainly by spectroscopic techniques including 2D-NMR (HMBC, HMQC, (1)H,(1)H-COSY, NOESY) and MS experiments. Compounds 1-5 were tested for their antiproliferative activity towards the human colorectal carcinoma (HCT-116) cell line. The nonglycosidic compound 5 exhibited the highest activity of the tested withanolides, with an IC(50) value of 3.2+/-0.2 microM (Table 3).
authors.affiliation: Shanghai Research Center for Modernization of Traditional Chinese Medicine, Shanghai Institute of Materia Medica, Shanghai, 201203, PR China.
authors.forename: Lei
authors.initials: L
authors.lastname: Ma
authors.forename: Chuan-Ming
authors.initials: CM
authors.lastname: Xie
authors.forename: Jia
authors.initials: J
authors.lastname: Li
authors.forename: Feng-Chang
authors.initials: FC
authors.lastname: Lou
authors.forename: Li-Hong
authors.initials: LH
authors.lastname: Hu
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002470:Cell Survival / Q000187:drug effects; D032302:Datura; D004354:Drug Screening Assays, Antitumor / Q000379:methods; D004875:Ergosterol / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D045325:HCT116 Cells; D006801:Humans; D035261:Plant Components, Aerial; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D032341:Withania
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D006027:Glycosides; D010936:Plant Extracts; D004875:Ergosterol