Biomaterial Database

ent-kaurane and ent-pimarane diterpenoids from Siegesbeckia pubescens. 2010

Rui Wang, and Wen-Hao Chen, and Yan-Ping Shi

State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People's Republic of China.

Phytochemical investigation of the above-ground parts of Siegesbeckia pubescens yielded 25 diterpenoids, including five new ent-pimarane diterpenoids (1-3, 11, and 12) and four new ent-kaurane diterpenoids (13-16). The structures and relative configurations of the new compounds were elucidated by comprehensive spectroscopic analysis and by comparison of their NMR data with those of related compounds. Single-crystal X-ray diffraction analysis confirmed the structures of 8, 13, and 14. Seven of these diterpenoids were evaluated for cytotoxic activity against HSC-T6, HeLa, and B16 cell lines. Compounds 11 and 14 exhibited moderate cytotoxicity.

UI	MeSH Term	Description	Entries
D008968	Molecular Conformation	The characteristic three-dimensional shape of a molecule.	Molecular Configuration,3D Molecular Structure,Configuration, Molecular,Molecular Structure, Three Dimensional,Three Dimensional Molecular Structure,3D Molecular Structures,Configurations, Molecular,Conformation, Molecular,Conformations, Molecular,Molecular Configurations,Molecular Conformations,Molecular Structure, 3D,Molecular Structures, 3D,Structure, 3D Molecular,Structures, 3D Molecular
D004354	Drug Screening Assays, Antitumor	Methods of investigating the effectiveness of anticancer cytotoxic drugs and biologic inhibitors. These include in vitro cell-kill models and cytostatic dye exclusion tests as well as in vivo measurement of tumor growth parameters in laboratory animals.	Anticancer Drug Sensitivity Tests,Antitumor Drug Screens,Cancer Drug Tests,Drug Screening Tests, Tumor-Specific,Dye Exclusion Assays, Antitumor,Anti-Cancer Drug Screens,Antitumor Drug Screening Assays,Tumor-Specific Drug Screening Tests,Anti Cancer Drug Screens,Anti-Cancer Drug Screen,Antitumor Drug Screen,Cancer Drug Test,Drug Screen, Anti-Cancer,Drug Screen, Antitumor,Drug Screening Tests, Tumor Specific,Drug Screens, Anti-Cancer,Drug Screens, Antitumor,Drug Test, Cancer,Drug Tests, Cancer,Screen, Anti-Cancer Drug,Screen, Antitumor Drug,Screens, Anti-Cancer Drug,Screens, Antitumor Drug,Test, Cancer Drug,Tests, Cancer Drug,Tumor Specific Drug Screening Tests
D004365	Drugs, Chinese Herbal	Chinese herbal or plant extracts which are used as drugs to treat diseases or promote general well-being. The concept does not include synthesized compounds manufactured in China.	Chinese Herbal Drugs,Plant Extracts, Chinese,Chinese Drugs, Plant,Chinese Plant Extracts,Extracts, Chinese Plant,Herbal Drugs, Chinese
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000972	Antineoplastic Agents, Phytogenic	Agents obtained from higher plants that have demonstrable cytostatic or antineoplastic activity.	Antineoplastics, Botanical,Antineoplastics, Phytogenic,Agents, Phytogenic Antineoplastic,Botanical Antineoplastics,Phytogenic Antineoplastic Agents,Phytogenic Antineoplastics
D015394	Molecular Structure	The location of the atoms, groups or ions relative to one another in a molecule, as well as the number, type and location of covalent bonds.	Structure, Molecular,Molecular Structures,Structures, Molecular
D045784	Abietanes	A subclass of cyclical DITERPENES that contain the abietane ring structure.	Abietane Diterpene,Abietane Diterpenoid,Abietane Diterpenoids,Diterpenes, Abietane,Isopimarane,Isopimaranes,Totarane Diterpene,Totarane Diterpenes,Totaranes,Diterpenes, Pimarane,Pimaranes,Abietane Diterpenes,Diterpene, Abietane,Diterpene, Totarane,Diterpenoid, Abietane,Pimarane Diterpenes
D045786	Diterpenes, Kaurane	A group of DITERPENES cyclized into four rings.	Ent-Kaurane,Ent-Kaurene,Kaurane,Kaurane Diterpenoid,Kaurane Diterpenoids,Ent-Kauranes,Ent-Kaurenes,Kauranes,Diterpenoid, Kaurane,Diterpenoids, Kaurane,Ent Kaurane,Ent Kaurene,Kaurane Diterpenes
D018360	Crystallography, X-Ray	The study of crystal structure using X-RAY DIFFRACTION techniques. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)	X-Ray Crystallography,Crystallography, X Ray,Crystallography, Xray,X Ray Crystallography,Xray Crystallography,Crystallographies, X Ray,X Ray Crystallographies
D019659	Asteraceae	A large plant family of the order Asterales, subclass Asteridae, class Magnoliopsida. The family is also known as Compositae. Flower petals are joined near the base and stamens alternate with the corolla lobes. The common name of "daisy" refers to several genera of this family including Aster; CHRYSANTHEMUM; RUDBECKIA; TANACETUM.	Aspilia,Carpesium,Clibadium,Compositae,Doronicum,Emilia Plant,Heterotheca,Iostephane,Leopard's Bane, False,Lychnophora,Phagnalon,Sphaeranthus,Trixis,Viguiera,Enhydra fluctuans,Ixeris,Pseudognaphalium,Silphium,Aspilias,Bane, False Leopard's,Banes, False Leopard's,Carpesiums,Clibadiums,Doronicums,Emilia Plants,Enhydra fluctuan,False Leopard's Bane,False Leopard's Banes,Heterothecas,Iostephanes,Ixeri,Leopard Bane, False,Leopard's Banes, False,Leopards Bane, False,Lychnophoras,Phagnalons,Plant, Emilia,Plants, Emilia,Pseudognaphaliums,Silphiums,Trixi,Viguieras,fluctuan, Enhydra