title: Furanolabdane diterpenes from Hypoestes purpurea.
abstract: Four new furanolabdane diterpenes, hypopurin A (1), hypopurin B (2), hypopurin C (3), and hypopurin D (4), together with eight lignans, alpha-O-methylcubebin, beta-O-methylcubebin, hinoquinin, helioxanthin, 7-hydroxyhinokinin, dehydroxycubebin, justicidine E, and (-)-hibalactone, as well as two triterpenes, lupeol and betulin, were isolated from the dried aerial part of Hypoestes purpurea. The structures of 1-4 were elucidated mainly on the basis of NMR and MS. Compound 1 was found to be moderately cytotoxic toward the KB cell line with an IC(50) value of 9.4 microM.
authors.affiliation: National Research Institute of Chinese Medicine, No. 155-1, Sec. 2, Li Nung Street, Peitou, Taipei, Taiwan.
authors.forename: Chien-Chang
authors.initials: CC
authors.lastname: Shen
authors.forename: Ching-Li
authors.initials: CL
authors.lastname: Ni
authors.forename: Yu-Ling
authors.initials: YL
authors.lastname: Huang
authors.forename: Ray-Ling
authors.initials: RL
authors.lastname: Huang
authors.forename: Chien-Chih
authors.initials: CC
authors.lastname: Chen
mesh_terms: D027901:Acanthaceae / Q000737:chemistry*; D002681:China; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D020128:Inhibitory Concentration 50; D007624:KB Cells; D013058:Mass Spectrometry; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D053978:Pentacyclic Triterpenes; D010946:Plants, Medicinal / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification; D014407:Tumor Cells, Cultured; D000094062:Betulinic Acid; D000094042:Lupanes
chemical_list: D004224:Diterpenes; D053978:Pentacyclic Triterpenes; D014315:Triterpenes; C002503:betulin; D000094062:Betulinic Acid; C010480:lupeol; D000094042:Lupanes