title: Three new adjacent bis-tetrahydrofuran acetogenins with four hydroxyl groups from Asimina triloba.
abstract: Three new adjacent bis-tetrahydrofuran ring Annonaceous acetogenins with four hydroxy groups, bullatetrocin (1), 10-hydroxyasimicin (2), and 10-hydroxytrilobacin (3), were isolated by activity-directed fractionation from the stem bark of Asimina triloba. Their structures were established on the basis of chemical and spectral evidence. The absolute stereochemistry at the C-10 hydroxy position was determined by converting 2 and 3 to their ketolactone isomers, 2,4-cis/trans 10-hydroxyasimicinones and 2,4-cis/trans 10-hydroxytrilobacinones, respectively. The bioactivities of the new compounds against brine shrimp larvae and six human solid-tumor cell lines are reported, and structure-activity relationships between trihydroxylated and tetrahydroxylated acetogenins are discussed. In addition to 1-3, gigantetrocin A, 2,4-cis/trans-gigantetrocin A-ones, annonacin, and annonacin A were also isolated for the first time from this species.
authors.affiliation: Department of Medicinal Chemistry and Molecular Pharmacology, School of Pharmacy and Pharmacal Sciences, Purdue University, West Lafayette, Indiana 47907, USA.
authors.forename: K
authors.initials: K
authors.lastname: He
authors.forename: G
authors.initials: G
authors.lastname: Shi
authors.forename: G X
authors.initials: GX
authors.lastname: Zhao
authors.forename: L
authors.initials: L
authors.lastname: Zeng
authors.forename: Q
authors.initials: Q
authors.lastname: Ye
authors.forename: J T
authors.initials: JT
authors.lastname: Schwedler
authors.forename: K V
authors.initials: KV
authors.lastname: Wood
authors.forename: J L
authors.initials: JL
authors.lastname: McLaughlin
mesh_terms: D000818:Animals; D001156:Artemia; D004354:Drug Screening Assays, Antitumor; D005663:Furans / Q000302:isolation & purification* / Q000494:pharmacology; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D019441:Plant Epidermis / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013329:Structure-Activity Relationship; D014407:Tumor Cells, Cultured
chemical_list: C103451:10-hydroxyasimicin; D005663:Furans; C103452:bullatetrocin