title: A new acyclic diterpene acid and bioactive compounds from Knema glauca.
abstract: Investigation of the chemical constituents of the fruits of Knema glauca (Myristicaceae) yielded a new acyclic diterpene acid, named glaucaic acid 4, together with four acylphenols, including 1-(2,6-dihydroxyphenyl) tetradecan-1-one 1, malabaricone A 6, dodecanoylphloroglucinol 7 and 1-(2,4,6-trihydroxyphenyl)-9-phenylnonan-1-one 8, two lignans sesamin 2 and asarinin 3, and a flavan, myristinin D 5. In addition, myristinin A 9 and (+/-)-7,4'-dihydroxy-3'-methoxyflavan 10 were isolated from its leaves and stems, respectively. When tested against small-cell lung cancer (NCI-H187), epidermoid carcinoma (KB) and breast cancer (BC) cell lines, compounds 1, 6-8 and 10 displayed weak to moderate cytotoxicity. The acylphenols 6-8 displayed antituberculosis activity against the microbe Mycobacterium tuberculosis with MIC values of 25, 50 and 100 microg/mL, respectively, and antiviral activity against herpes simplex virus type 1, with 7 as the most active compound (IC(50) = 3.05 microg/mL). Malabaricone A 6 was also active against the malarial parasite Plasmodium falciparum with an IC(50) value of 2.78 microg/mL.
authors.affiliation: Department of Pharmaceutical Botany, Chulalongkorn University, Bangkok, 10330, Thailand.
authors.forename: Noppadon
authors.initials: N
authors.lastname: Rangkaew
authors.forename: Rutt
authors.initials: R
authors.lastname: Suttisri
authors.forename: Masataka
authors.initials: M
authors.lastname: Moriyasu
authors.forename: Kazuko
authors.initials: K
authors.lastname: Kawanishi
mesh_terms: D000818:Animals; D000962:Antimalarials / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000995:Antitubercular Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000998:Antiviral Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D005638:Fruit; D006801:Humans; D006839:Hydrocarbons, Acyclic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D020128:Inhibitory Concentration 50; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D009169:Mycobacterium tuberculosis / Q000187:drug effects / Q000254:growth & development; D026324:Myristicaceae / Q000737:chemistry*; D018515:Plant Leaves; D018547:Plant Stems; D010963:Plasmodium falciparum / Q000187:drug effects / Q000254:growth & development; D018139:Simplexvirus / Q000187:drug effects / Q000254:growth & development
chemical_list: D000962:Antimalarials; D000972:Antineoplastic Agents, Phytogenic; D000995:Antitubercular Agents; D000998:Antiviral Agents; D004224:Diterpenes; D006839:Hydrocarbons, Acyclic