Results 131 to 140 of about 942 (157)

Complete1H and13C NMR assignment of a kaurane diterpene fromPiliostigma thonningii

Magnetic Resonance in Chemistry, 1997
The diterpene ent-16α-hydroxykauran-18-oic acid was isolated from the leaves of Piliostigma thonningii. Structural elucidation and complete 1H and 13C NMR chemical shift assignments of this compound were achieved by 2D experiments. © 1997 John Wiley & Sons, Ltd.
M.-T. Martin, M. Païs, A. O. Ogundaini, J. C. Ibewuilke, F. O. Ogungbamila   +4 more
openaire   +1 more source

Kolavane and kaurane diterpenes from the stem bark of Xylopia aethiopica

Phytochemistry, 1982
Abstract The stem bark of Xylopia aethiopica has yielded four diterpenes, two of them novel. Three of the diterpenes were identified as (−)-kaur-16-en-19-oic acid and its 7-oxo and 7β-hydroxy derivatives. The fourth was the novel kolavane derivative 2-oxo-kolav-3,13-dien-15-oic acid, a type of compound not previously recorded in the Annonaceae.
Choudhury M. Hasan, Terence M. Healey, Peter G. Waterman   +2 more
openaire   +1 more source

Kaurane-Type Diterpene Glycoside from the Stem Bark ofAcanthopanax trifoliatus

Planta Medica, 2004
A new diterpene glycoside, acantrifoside D ( 1), as well as three known diterpenes (2 - 4) were isolated from the stem bark of Acanthopanax trifoliatus from Vietnam. Based on 1D and 2D NMR spectroscopic data, their chemical structures were determined to be 16alpha,17-dihydroxy- ent-kauran-19-oic acid 16- O-beta- D-glucopyranoside 19- O-beta- D ...
Phan Van, Kiem, Xing Fu, Cai, Chau Van, Minh, Jung Joon, Lee, Young Ho, Kim   +4 more
openaire   +2 more sources

A unified synthetic approach to trachylobane-, beyerane-, atisane- and kaurane-type diterpenes

Tetrahedron, 2006
A general synthetic approach to the polycyclic carbon skeleton of biogenetically related trachylobane, beyerane, atisane, and kaurane diterpenes from carvone is described. The skeleton of these diterpenes is prepared from a common intermediate, that is, 25, readily prepared from carvone using an IMDA reaction and an intramolecular diazo ketone ...
Antonio Abad, Consuelo Agulló, Ana C. Cuñat, Ignacio de Alfonso Marzal, Ismael Navarro, Antonio Gris   +5 more
openaire   +1 more source

A New ent-kaurane Diterpene Glycoside from Seeds of Pharbitis nil

Chemistry of Natural Compounds, 2017
A new ent-kaurane diterpene glycoside, pharboside H (1), and three known compounds, benzyl β-D-glucopyranoside (2), 1-(4′-O-glucopyranosyl-4′-hydroxy-3′,5′-dimethoxyphenyl)-2{2′′,6′′-dimethoxy-4′′-[1-(E) propen-3-ol]-phenoxy}-propane-l,3-diol (3), and butyl caffeate (4), were isolated from the seeds of Pharbitis nil. The structure of the new compound 1
Kyeong Wan Woo, Kyoung Jin Park, Sang Zin Choi, Mi Won Son, Ki Hyun Kim, Kang Ro Lee   +5 more
openaire   +1 more source

An ent-kaurane diterpene from Mikania laevigata (Asteraceae)

Planta Medica, 2007
L Baratto, EP Schenkel, M Falkenberg
openaire   +1 more source

Kaurane-Related Diterpenes as Leishmania Pteridine Redutase Inhibitors: an In-Silico Study

2013
Pteridine reductase-1 (PTR1) is one of enzymes discovered as being responsible for the reduced susceptibility to antifolates (eg, metotrexato) of trypanosomic parasites, which has become a chemotherapeutic target. Therefore, thirteen known kaurane-related diterpenes were evaluated in silico against PTR1 by molecular docking and pharmacophore modeling ...
Orduz Díaz, Luisa, Bernal, Freddy, Coy Barrera, Ericsson   +2 more
openaire   +1 more source

Ent-kaurane-type diterpenoids from the liverwort Jungermannia exsertifolia ssp. cordifolia

Phytochemistry, 1996
Yoshinori Asakawa, Hironao Tanaka, Fumihiro Nagashima   +2 more
exaly  

An ent-kaurane from Sideritis huber-morathii

Phytochemistry, 1996
Maria Luisa Bondi', Maurizio Bruno, Franco Piozzi   +2 more
exaly  

Synthesis, cytotoxicity and antiplasmodial activity of novel ent -kaurane derivatives

European Journal of Medicinal Chemistry, 2013
Arturo San Feliciano Martín, Andres Francesch, Maria Angeles Castro   +2 more
exaly