Results 51 to 60 of about 1,611 (171)

Kaurane-Type Diterpenes from Fern Frond Exudates

Zeitschrift für Naturforschung C, 1989
Abstract The viscid exudate found on fronds of the fern, Cheilanthes kaulfussii, consists of terpenoids in which flavonoid aglycones are dissolved. One of the terpenes is shown to be em-kaur-16-en-19-oic acid. The farinose frond exudate of Notholaena pallens contains this acid as the major constituent and its 3 R-hydroxy derivative ...
Peter Rüedi, Eckhard Wollenweber, Dieter Marx, Cornelia Scheele   +3 more
openaire   +1 more source

A new ent-kaurane diterpene from Euphorbia stracheyi Boiss [PDF]

Natural Product Research, 2016
The chemical investigation of whole plants Euphorbia stracheyi Boiss from China led to the isolation of one new ent-kaurane diterpene, ent-Kaurane-16β,17,19-triol-3-one (1), along with three known ent-kaurane diterpenoids (2–4) as ent-Kaurane-3α,16β,17-triol (2)，ent-16S,17-dihydroxy-kaurane-3-one (3) and ent-3S,16S,17-trihydroxy-kaurane-2-one (4 ...
Tie, Liu, Qian, Liang, Na-Na, Xiong, Lin-Feng, Dai, Jun-Ming, Wang, Xiao-Hui, Ji, Wen-Hui, Xu   +6 more
openaire   +2 more sources

Production of ent-kaurene from lignocellulosic hydrolysate in Rhodosporidium toruloides. [PDF]

, 2020
BACKGROUND:Rhodosporidium toruloides has emerged as a promising host for the production of bioproducts from lignocellulose, in part due to its ability to grow on lignocellulosic feedstocks, tolerate growth inhibitors, and co-utilize sugars and lignin ...
Burnum-Johnson, Kristin E, Clay, Derek M, Gao, Yuqian, Geiselman, Gina M, Gladden, John M, Kirby, James, Magnuson, Jon K, Munoz Munoz, Nathalie, Nicora, Carrie D, Papa, Gabriella, Prahl, Jan-Philip, Skerker, Jeffrey M, Sundstrom, Eric R, Tanjore, Deepti, Tran-Gyamfi, Mary B, Zhuang, Xun   +15 more
core   +1 more source

Chemical and antimicrobial analyses of Sideritis romana L. subsp. purpurea (Tal. ex Benth.) Heywood, an endemic of the Western Balkan [PDF]

, 2017
A comprehensive study on essential oil and different solvent extracts of Sideritis romana L. subsp. purpurea (Tal. ex Benth.) Heywood (Lamiaceae) from Montenegro is reported. The gas chromatography-mass spectrometry analysis of the essential oil revealed
Božović, Mijat, Cipolla, Alessia, De Angelis, Massimiliano, Garzoli, Stefania, Oliva, Alessandra, Ragno, Rino, Tadić, Vanja, Vullo, Vincenzo   +7 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.
Shigeru SHIMIZU, Toshio MIYASE, Kaoru UMEHARA, Akira UENO   +3 more
openaire   +2 more sources

Kupeantha (Coffeeae, Rubiaceae), a new genus from Cameroon and Equatorial Guinea [PDF]

, 2018
Two new coffee relatives (tribe Coffeeae, Rubiaceae), discovered during botanical expeditions to Cameroon, are examined for generic placement, and the placement of three previously known species (Argocoffeopsis fosimondi, A. spathulata and Calycosiphonia
Alvarez-Aguirre, Maria G, Cheek, Martin, Grall, Aurélie, Howes, Melanie-Jayne R, Larridon, Isabel, Sonké, Bonaventure   +5 more
core   +3 more sources

Diterpene Synthases and Their Responsible Cyclic Natural Products [PDF]

, 2014
This review provides an overview of diterpene synthases which were initially identified via genetic and/or biochemical means, traversing all organisms researched to ...
Hai-Yan Gong, Xiao-Ya Chen, Ying Zeng
core   +1 more source

ent-Pimarane and ent-Kaurane Diterpenes from Aldama discolor (Asteraceae) and Their Antiprotozoal Activity

Molecules, 2016
Aldama discolor (syn.Viguiera discolor) is an endemic Asteraceae from the Brazilian “Cerrado”, which has not previously been investigated for its chemical constituents and biological activity.
Mauro S. Nogueira, Fernando B. Da Costa, Reto Brun, Marcel Kaiser, Thomas J. Schmidt   +4 more
doaj   +1 more source

Casbane diterpene as a promising natural antimicrobial agent against biofilm-associated infections [PDF]

, 2010
Croton nepetaefolius is a native plant from northeastern Brazil that belongs to the Euphorbiaceae family. The biological action of this plant has been extensively explored, being the secondary metabolites responsible for its properties alkaloids ...
Benildo Sousa Cavada, Burton, Edson Holanda Teixeira, El Mekkawy, Francisco Vassiliepe Sousa Arruda, Hélcio Silva dos Santos, Kuzma, Majtán, Maria Olívia Pereira, Maria Rose Jane Ribeiro Albuquerque, Mariana Henriques, McChesney, Murillo, Paulo Nogueira Bandeira, Rehm, Rocchetta, Taweechaisupapong, Victor Alves Carneiro, Xu   +18 more
core   +2 more sources

A new ent-kaurane diterpene from Isodon henryi

Natural Product Research, 2019
One new ent-Kaurane diterpenoid (1) was isolated from the ethyl acetate fraction of Isodon henryi. Along with ten diterpenoids (2–11) were isolated from this plant for the first time, including six 7,20-epoxy diterpenoids, three enmenol-type diterpenoids and one 6,7-seco-ent-kaurene diterpenoid.
Xue, Jiang, Ling-Xia, Zhang, Qing-Mei, Feng, Hong, Wu, Ya-Lin, Liu, De-Qin, Wang, Li-Ping, Dai, Zhi-Min, Wang   +7 more
openaire   +2 more sources