Results 21 to 30 of about 9,230,804 (307)

A PRELIMINARY QUALITATIVE STUDY OF AN ALKALOID IN THE FRUIT OF TERONG BELANDA (Cyphomandra betacea, Cav)

open access: yesIndonesian Journal of Chemistry, 2010
Preliminary studies on Terong Belanda (C. betacea ) have been carried out in this investigation with an aim to examine the presence of an alkaloid in the fruit of Terong Belanda.
Fredryk Mandey   +2 more
doaj   +1 more source

The crystal structure of 13-(pyrazole-1-yl-4-carbonitrile)-matrine, C19H25N5O

open access: yesZeitschrift für Kristallographie - New Crystal Structures, 2021
C19H25N5O, monoclinic, P21 (no. 4), a = 16.0600(2) Å, b = 5.3992(1) Å, c = 19.8514(2) Å, β = 94.260(1)°, V = 1716.58(4) Å3, Z = 4, Rgt (F) = 0.0350, wRref(F2) = 0.0908, T = 100.00(10) K.
Li Jun-Jie   +8 more
doaj   +1 more source

Perylenequinones from an endophytic Alternaria sp. of Pinus ponderosa

open access: yesHeliyon, 2018
The differential solvent extraction and further purification of fractions of endophytic Alternaria sp. isolated from Pinus ponderosa led to the isolation of further two perylenequinone compounds as 3,6,6a,9,10-pentahydroxy-7,8-epoxy-4-oxo-4,5,6,6a,6b,7,8,
Mudasir A. Tantry   +7 more
doaj   +1 more source

Isolation and characterization of starch from Limnophila aromatica

open access: yesHeliyon, 2019
Starch is one of the digestible natural polymers found in vascular plants. This natural polymer is the primary source of polysaccharides to produce energy for humans.
Cynthia Wijaya   +7 more
doaj   +1 more source

Furan-site transformations of obacunone as potent insecticidal agents

open access: yesHeliyon, 2018
Furan ring is a key pharmacophore for insecticidal activity of limoninoids. To develop natural-product-based insecticidal agents, a series of furan-site transformations (2, 3 and 3a–j) of obacunone were synthesized by selective bromination and following ...
Ping Xiang   +5 more
doaj   +1 more source

First Stereoselective Total Synthesis of (3)-De--methylbotryosphaeriodiplodin

open access: yesNatural Product Communications, 2019
A simple and highly efficient first stereoselective total synthesis of a benzofused macrocyclic lactone, ( 3S,7R )-de- O -methylbotryosphaeriodiplodin has been accomplished utilizing Jacobson's kinetic resolution, Marouka asymmetric allylation, Stille ...
Jhillu S. Yadav   +5 more
doaj   +1 more source

Natural Products Chemistry [PDF]

open access: yesNature, 1964
The Chemistry of Natural Products Special and Introductory Lectures presented at the Second International Symposium on the Chemistry of Natural Products held in Prague, August 27–September 2, 1962. (International Union of Pure and Applied Chemistry, Section of Organic Chemistry, in conjunction with the Czechoslovak Academy of Science and the ...
openaire   +1 more source

DataSheet1_Click Chemistry in Natural Product Modification.PDF

open access: yes, 2021
Click chemistry is perhaps the most powerful synthetic toolbox that can efficiently access the molecular diversity and unique functions of complex natural products up to now.
Xiang Zhang (19800)   +5 more
core   +1 more source

Analysis of major carotenoids and fatty acid composition of freshwater microalgae

open access: yesHeliyon, 2019
Considering the nutraceutical properties, the high commercial value from pigments and essential lipids and the environmental sustainability, the purposes of this study were to assess the major carotenoids and fatty acids composition of nine microalgae ...
Aline Terra Soares   +3 more
doaj   +1 more source

Editorial to the Special Issue—“Technology for Natural Products Research” [PDF]

open access: yes, 2020
Natural product research continues to be a productive source of unusual chemistry, producing novel compounds for biomedical applications and, increasingly, sustainably providing commercially useful compounds [...
Brendan M. Duggan, Duggan, Brendan M
core   +1 more source

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