title: Isariotins E and F, spirocyclic and bicyclic hemiacetals from the entomopathogenic fungus Isaria tenuipes BCC 12625.
abstract: New spirocyclic and bicyclic hemiacetals, isariotins E (1) and F (2), together with TK-57-164A (3) were isolated from the entomopathogenic fungus Isaria tenuipes BCC 12625. The absolute configuration of 3 was addressed by application of the modified Mosher's method. Isariotin F (2) exhibited activity against the malaria parasite Plasmodium falciparum K1 with an IC(50) value of 5.1 microM and cytotoxic activities against cancer cell lines (KB, BC, and NCI-H187) and nonmalignant (Vero) cells with respective IC(50) values of 15.8, 2.4, 1.6, and 2.9 microM.
authors.affiliation: National Center for Genetic Engineering and Biotechnology (BIOTEC), Klong Luang, Pathumthani, Thailand. taridaporn@biotec.or.th
authors.forename: Taridaporn
authors.initials: T
authors.lastname: Bunyapaiboonsri
authors.forename: Seangaroon
authors.initials: S
authors.lastname: Yoiprommarat
authors.forename: Kamolphan
authors.initials: K
authors.lastname: Intereya
authors.forename: Pranee
authors.initials: P
authors.lastname: Rachtawee
authors.forename: Nigel L
authors.initials: NL
authors.lastname: Hywel-Jones
authors.forename: Masahiko
authors.initials: M
authors.lastname: Isaka
mesh_terms: D000818:Animals; D000962:Antimalarials / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D000995:Antitubercular Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002176:Candida albicans / Q000187:drug effects; D002522:Chlorocebus aethiops; D004354:Drug Screening Assays, Antitumor; D004852:Epoxy Compounds / Q000737:chemistry / Q000302:isolation & purification*; D006572:Heterocyclic Compounds, Bridged-Ring / Q000737:chemistry / Q000302:isolation & purification*; D006801:Humans; D006999:Hypocreales / Q000737:chemistry*; D020128:Inhibitory Concentration 50; D015394:Molecular Structure; D009169:Mycobacterium tuberculosis / Q000187:drug effects; D021261:Parasitic Sensitivity Tests; D010963:Plasmodium falciparum / Q000187:drug effects*; D013141:Spiro Compounds / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D013785:Thailand; D014709:Vero Cells
chemical_list: D000962:Antimalarials; D000970:Antineoplastic Agents; D000995:Antitubercular Agents; D019086:Bridged Bicyclo Compounds, Heterocyclic; D004852:Epoxy Compounds; D006572:Heterocyclic Compounds, Bridged-Ring; D013141:Spiro Compounds; C540637:TK-57-164A; C540635:isariotin E; C540636:isariotin F