title: New cytotoxic triterpene acids from aboveground parts of Manihot esculenta from the Suriname rainforest.
abstract: Two novel triterpene acids, esculentoic acid A ( 1) and B ( 2) as well as the seven known compounds 3 - 9 were isolated from an EtOAc extract of leaves, stems, and twigs of Manihot esculenta by bioassay-guided fractionation for cytotoxic activity. The structures of the two new compounds were established as 3alpha-hydroxytaraxer-14-en-29-oic acid ( 1) and 3-oxotaraxer-14-en-29-oic acid ( 2) on the basis of 1D and 2D NMR spectroscopic data interpretation and chemical conversions. The two new compounds 1 and 2 showed moderate cytotoxicity against the A2780 human ovarian cancer cell line.
authors.forename: V S
authors.initials: VS
authors.lastname: Chaturvedula
authors.forename: Jennifer K
authors.initials: JK
authors.lastname: Schilling
authors.forename: Stan
authors.initials: S
authors.lastname: Malone
authors.forename: Jan H
authors.initials: JH
authors.lastname: Wisse
authors.forename: Marga C
authors.initials: MC
authors.lastname: Werkhoven
authors.forename: David G
authors.initials: DG
authors.lastname: Kingston
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D005260:Female; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D002365:Manihot; D010051:Ovarian Neoplasms / Q000188:drug therapy / Q000473:pathology; D008517:Phytotherapy; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D018515:Plant Leaves; D018547:Plant Stems; D013532:Suriname; D014315:Triterpenes / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D014407:Tumor Cells, Cultured / Q000187:drug effects
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D010936:Plant Extracts; D014315:Triterpenes