title: Cytotoxic limonoids and tetranortriterpenoids from Melia azedarach.
abstract: The ethanolic extract of the root bark of Melia azedarach exhibited cytotoxic activity against lymphocytic leukemia P388 cell lines in vitro. Systematic fractionation of the extract monitored by cytotoxic bioassay led to the isolation of two new azadirachtin-type limonoids, 1-tigloyl-3-acetyl-11-methoxymeliacarpinin (1) and 1-acetyl-3-tigloyl-11-methoxymeliacarpinin (2), together with three highly cytotoxic sendanin-type limonoids, 29-isobutylsendanin (3), 12-hydroxyamoorastin (4) and 29-deacetylsendanin (5). The acetylated derivatives of 4 also underwent cytotoxic bioassay.
authors.affiliation: Department of Pharmacognosy, Tokyo College of Pharmacy, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Itokawa
authors.forename: Z S
authors.initials: ZS
authors.lastname: Qiao
authors.forename: C
authors.initials: C
authors.lastname: Hirobe
authors.forename: K
authors.initials: K
authors.lastname: Takeya
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000633:toxicity*; D004354:Drug Screening Assays, Antitumor; D007941:Leukemia P388 / Q000188:drug therapy; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification* / Q000633:toxicity*; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D013329:Structure-Activity Relationship; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000633:toxicity*
chemical_list: D000970:Antineoplastic Agents; D010936:Plant Extracts; D014315:Triterpenes