Results 131 to 140 of about 1,522 (163)

New Hemiterpene Glycosides in Vitis vinifera Wine

Journal of Natural Products, 1997
Two new hemiterpene glycosides were isolated from a Vitis vinifera cv. Gewurztraminer wine and were identified by mass spectrometry and NMR spectroscopy as O-β-d-apiofuranosyl-(1→6)-O-β-d-glucopyranosides of 3-methyl-2-butenol (1) and of 3-methyl-3-butenol (3).
Baltenweck-Guyot, R., Trendel, J.M., Albrecht, P., Schaeffer, Alex   +3 more
openaire   +2 more sources

Hemialboside, a hemiterpene glucoside from Lamium album

Phytochemistry, 1995
Abstract Hemialboside, (S)-1- hydroxy-3-methylbut-3-en-2-yl -β- d -glucopyranoside , was isolated from Lamium album and its structure elucidated from 1H and 13CNMR spectral data.
Søren Damtoft, Søren Rosendal Jensen
openaire   +1 more source

Coumarin-hemiterpene ethers from Artemisia species

Phytochemistry, 1985
Abstract In addition to a known derivative, five new coumarin-hemiterpene ethers were isolated from the leaves of Artemisia laciniata, A. armeniaca and A. tanacetifolia and identified by 1H NMR and, in part, by 13C NMR spectroscopy. The coumarin patterns are characterized particularly by compounds with a hydroxylated and saturated isoprenoid unit ...
Géza Szabó, Harald Greger, Otmar Hofer
openaire   +1 more source

A new class of mealybug pheromones: a hemiterpene ester in the sex pheromone of Crisicoccus matsumotoi

Naturwissenschaften, 2012
Mealybugs, which include several agricultural pests, are small sap feeders covered with a powdery wax. They exhibit clear sexual dimorphism; males are winged but fragile and short lived, whereas females are windless and less mobile. Thus, sex pheromones emitted by females facilitate copulation and reproduction by serving as a key navigation tool for ...
Jun, Tabata, Yutaka, Narai, Nobuo, Sawamura, Syuntaro, Hiradate, Hajime, Sugie   +4 more
openaire   +2 more sources

Hepatoprotective hemiterpene glycosides from the rhizome of Cibotium barometz (L.) J. Sm

Phytochemistry, 2017
Five previously undescribed hemiterpene glycosides, cibotiumbarosides E-I, and two known hemiterpene glucosides, were isolated from the rhizome of Cibotium barometz (L.) J. Sm. The structures of cibotiumbarosides E-I were established by 1D and 2D NMR spectroscopic analyses and HRMS.
Mei-Ping, Xie, Lan, Li, Hua, Sun, An-Qi, Lu, Bo, Zhang, Jian-Gong, Shi, Dan, Zhang, Su-Juan, Wang   +7 more
openaire   +2 more sources

New hemiterpene and furolactone-type lignan glycosides from Securidaca inappendiculata Hassk

Phytochemistry Letters, 2020
Abstract One new hemiterpene glycoside, securiterpenoside G (1), one new furolactone-type lignan glycoside, (7R,8R,8′S)-glaberide I 4-O-β-D-glucopyranosyl-(1‴→4″)-O-β-D-glucopyranoside (2), along with two known lignan glycosides, (7R,8R,8′S)-glaberide I 4-O-β-D-glucopyranoside (3) and (7S,7′S,8R,8′R)-4,4′-dihydroxy-3,5,3′,5′tetramethoxy-7,9′:7′,9 ...
Can Yang, Zhi Wang, Yan Qiu, Haiyan Zha, Xuedong Yang   +4 more
openaire   +1 more source

6-Prenyloxy-7-methoxycoumarin, a coumarin-hemiterpene ether from Carduus tenuiflorus

Phytochemistry, 1992
Abstract From the acetone extract of Carduus tenuiflorus , a new coumarin-hemiterpene ether was isolated, which was identified as 6-(3,3-dimethylallyloxy)-7-methoxycoumarin. The synthesis of this coumarin and that of its positional isomer 7-(3,3-dimethylallyloxy)-6-methoxycoumarin were carried out from esculetin.
Luz Cardona, Begoña García, Pedro José R., José Pérez   +3 more
openaire   +1 more source

ChemInform Abstract: New Bitter‐Tasting Hemiterpene Glycosides from the Japanese Fern Hymenophyllum barbatum.

ChemInform, 2002
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Masao Toyota, Yasushi Oiso, Yoshinori Asakawa   +2 more
openaire   +1 more source

Hemiterpene Glucosides with Anti-Platelet Aggregation Activities from Ilex pubescens

Journal of Natural Products, 2005
Two new hemiterpene glucosides named pubescenosides A and B were isolated from the root of Ilex pubescens. Their structures were elucidated on the basis of spectroscopic and chemical evidence as 2-(trans-caffeoyloxy)methyl-3-hydroxy-1-butene-4-O-beta-D-glucopyranoside and 2-hydroxymethyl-3-caffeoyloxy-1-butene-4-O-beta-D-glucopyranoside, respectively ...
Zhi-Hong, Jiang, Jing-Rong, Wang, Min, Li, Zhong-Qiu, Liu, Ka-Yee, Chau, Chi, Zhao, Liang, Liu   +6 more
openaire   +2 more sources

Synthetic studies in aromatic hemiterpenes of natural origin, Part 5: Synthesis of 6-acetyl-2,2-dimethyl-8-methoxychromene via benzylic oxidation route

Proceedings of the Indian Academy of Sciences - Section A, 1979
The synthesis of 6-acetyl-2,2-dimethyl-8-methoxychromene (1c), a naturally occurring isomer of encecalin (1a) has been described starting from 2,2,6-trimethyl-8-methoxychromene (2e) which was obtained from creosol (4) in two steps involving condensation of the phenol with malic acid to the coumarin (3), followed by Grignard reaction with CH2MgI.
Naidu, Venkama M, Rao, Krishna GS
exaly   +2 more sources