title: Bioactive constituents of the root bark of Artocarpus rigidus subsp. rigidus.
abstract: Investigation of the chemical constituents of the root bark of Artocarpus rigidus BLUME subsp. rigidus has led to the isolation of six, structurally diverse phenolic compounds. These included two new compounds with modified skeletons, the flavonoid 7-demethylartonol E (1) and the chromone artorigidusin (2), together with four known phenolic compounds, the xanthone artonol B (3), the flavonoid artonin F (4), the flavonoid cycloartobiloxanthone (5), and the xanthone artoindonesianin C (6). Compounds 1, 4, and 5 exhibited antiplasmodial activity against Plasmodium falciparum. All compounds showed antimycobacterial activity against Mycobacterium tuberculosis, with 4 being the most active compound (MIC 6.25 microg/ml). Compounds 5 and 6 were active against KB cells, whereas 2, 5, and 6 showed varying toxicity to BC cells. Compounds 1-3, 5, and 6 were active in the NCI-H187 cytotoxicity assay, with 3 being the most active compound (IC(50) 1.26 microg/ml).
authors.affiliation: Department of Chemistry, Faculty of Science, Ramkhamhaeng University, Bankok, Thailand.
authors.forename: Umalee
authors.initials: U
authors.lastname: Namdaung
authors.forename: Nuntana
authors.initials: N
authors.lastname: Aroonrerk
authors.forename: Sunit
authors.initials: S
authors.lastname: Suksamrarn
authors.forename: Kannawat
authors.initials: K
authors.lastname: Danwisetkanjana
authors.forename: Janya
authors.initials: J
authors.lastname: Saenboonrueng
authors.forename: Wisit
authors.initials: W
authors.lastname: Arjchomphu
authors.forename: Apichart
authors.initials: A
authors.lastname: Suksamrarn
mesh_terms: D000818:Animals; D031622:Artocarpus / Q000737:chemistry*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D002867:Chromones / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D006801:Humans; D009682:Magnetic Resonance Spectroscopy / Q000379:methods / Q000592:standards; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D009169:Mycobacterium tuberculosis / Q000187:drug effects; D010636:Phenols / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D024301:Plant Bark / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry*; D010963:Plasmodium falciparum / Q000187:drug effects; D012015:Reference Standards; D012680:Sensitivity and Specificity; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D044004:Xanthones / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology
chemical_list: D002867:Chromones; D005419:Flavonoids; D010636:Phenols; D044004:Xanthones; C516199:chromone artorigidusin; C000627997:cycloartobiloxanthone; C516198:flavonoid 7-demethylartonol E; C516200:flavonoid artonin F