Results 71 to 80 of about 1,096 (185)

Diterpenes and phenolic compounds from Sideritis pullulans

, 2014
Phytochemical investigation of Sideritis pullulans aerial part and root extracts allowed to isolate six ent-kaurane diterpenes, two phenylpropanoids, and one coumarin, identified as 1α,3α,7β,18-tetrahydroxy-ent- kaur-16-ene (sideripullol A) (1), 3α,11α ...
F. Dal Piaz, A. Bader, FAIELLA, LAURA, BRACA, ALESSANDRA   +3 more
core   +1 more source

Kaurane-type diterpenes from Adenostemma lavenia O. Kuntze.

Chemical and Pharmaceutical Bulletin, 1990
Ten 11-oxygenated kauran-19-oic acids, ent-11α, 15α-dihydroxykaur-16-en-19-oic acid, ent-11α-hydroxy-15α-acetoxykaur-16-en-19-oic acid, ent-11α-hydroxy-15-oxo-kaur-16-en-19-oic acid and adenostemmoic acids A-G and their nine glycosides, paniculosides II and III and adenostemmosides A-G were characterized from Adenostemma lavenia O. KUNTZE.
SHIMIZU, Shigeru, MIYASE, Toshio, UMEHARA, Kaoru, UENO, Akira   +3 more
openaire   +2 more sources

The chemistry of the Euphorbiaceae. V. The diterpenes from a Beyeria sp

, 1964
The isolation of three new diterpenes from Beyeria brevifolia is described. Evidence is presented which places these in the 16α-(-)-kaurane [(-)-β-dihydrokaurene] class of tetracyclic diterpenes and defines the stereochemistry at the additional ...
PR Jefferies, RS Rosich, GV Baddeley, MW Jarvis   +3 more
core   +1 more source

Study of Anti-Tuberculosis Activity Behaviour of Natural Kaurane and Trachylobane Diterpenes Compared with Structural Properties Obtained by Theoretical Calculations

Natural Product Communications, 2017
A set of seven diterpenes, three kauranes and four trachylobanes, isolated from the African plant Psiadia punctulata were assayed against Mycobacterium tuberculosis and reached activity comparable with cycloserine, a second line drug used to treat ...
Ana C. F. Soares, Mirela M. W. Cabral, Carlos H. G. Martins, Alexsandro E. Ferreira, Pedro A. S. Bergamo, Leonida K. Omosa, Jacob O. Midiwo, Renato L. T. Parreira, Vladimir C. G. Heleno   +8 more
doaj   +1 more source

Diterpenes from Sideritis trojana

, 2002
Six known ent-kaurene, a new ent-kaurane and a new pimarane diterpenes were isolated from Sideritis trojana. The structures of new compounds were determined as ent-7alpha-15beta,16beta-epoxykaurane (1), and ent-2alpha-hydroxy-8(14),15-pimaradiene (2 ...
Topcu, G, Tumen, G, Goren, AC, Kilic, T, Yildiz, YK   +4 more
core   +1 more source

A New Kaurane Diterpene from the Leaves of Callicarpa macrophylla Vahl

Biomedical & Pharmacology Journal, 2012
T he c hloroform extract of leaves of Callicarpa macrophylla Vahl. , yielded a new compound 16α - hydroxy - 17 - isopropylidino - 3 - oxo - phyllocladane along with calliterpenone and its monoacetate.
Vinay Kumar Verma, N.U. Siddiqui, Mohd. Aslam   +2 more
openaire   +1 more source

The chemistry of the Euphorbiaceae. XV. Further diterpenes from Ricinocarpus stylosus: 1a, 19-diliydroxy-16a-( - )-kauran-17-oic acid

, 1965
Another two diterpenes based on the (-)-kaurane skeleton have been isolated from Ricinocarpus stylosus. One is the known 16,17-dihydroxy-16β-(-)-kauran-19-oic acid (IIb) and the other has been shown to be lα,l9-dihydroxy-16α-(-)-kauran-17-oic acid (IVa).
PR Jefferies, CA Henrick
core   +1 more source

Bioactive Ent-Kaurane Diterpenes Oridonin and Irudonin Prevent Cancer Cells Migration by Interacting with the Actin Cytoskeleton Controller Ezrin

, 2020
The ent-kaurane diterpene oridonin was reported to inhibit cell migration and invasion in several experimental models. However, the process by which this molecule exerts its anti-metastatic action has not been yet elucidated.
Giuseppina Amodio, Valentina Pagliara, Pagliara, Valentina, Amodio, Giuseppina, Dal Piaz, Fabrizio, Paolo Remondelli, De Tommasi, Nunziatina, Remondelli, Paolo, Nunziatina De Tommasi, Ornella Moltedo, Fabrizio Dal Piaz, Donadio, Giuliana, Giuliana Donadio, Moltedo, Ornella   +13 more
core   +1 more source

Ent-kaurane diterpenoids isolated from Sideritis congesta

, 2011
A new ent-kaurane diterpenoid, together with eight known ent-kauranes, were isolated from the petroleum ether and acetone extracts of the whole plant of Sideritis congesta P. H. Davis & Hub.-Mor.
Mehmet Öztürk, Turgut Kılıç, Halfon, Belkis, Ozturk, Mehmet, Topcu, Gulacti, Gülaçtı Topçu, Belkıs Halfon, Abdülselam Ertaş, Dincel, Demet, Ertas, Abdulselam, Demet Dinçel, KILIÇ, TURGUT   +11 more
core   +1 more source

Diversity of the diterpenes in the leaves of Xylopia laevigata (Annonaceae) and their cytotoxicities

, 2020
The phytochemical investigation of the hexane extract which was obtained from the leaves of Xylopia laevigata (Annonaceae) produced six terpenes. Among these, five diterpenes named abieta-7,13-dien-3-one, ent-7β-acetoxy-16β-hydroxy-kaurane, 4-epi ...
Lívia M. Dutra (5836175), Hector H. F. Koolen (7205342), Emmanoel V. Costa (2829110), Cinara O. S. Costa (14495968), Milena B. P. Soares (6930857), Andersson Barison (724722), Felipe M. A. da Silva (8304096), Marília F. C. Sampaio (14495965), Maria Lúcia B. Pinheiro (7396589), Daniel P. Bezerra (6930860), Leociley R. A. Menezes (2887844)   +10 more
core   +1 more source