Results 81 to 90 of about 8,136 (224)

3-(4-Methoxybenzoyl)-6-nitrocoumarin

Acta Crystallographica Section E, 2013
In the title coumarin derivative (also known as 2H-chromen-2-one or 2H-1-benzopyran-2-one), C17H11NO6, the coumarin ring system is nearly planar, with a dihedral angle of 3.35 (9)° between the pyrone and the benzene rings.
Lourdes Santana, Eugenio Uriarte, Saleta Vazquez-Rodriguez   +2 more
doaj   +1 more source

Uncovering the Key Factors Influencing Phytochemical and Phytopharmacological Properties During Medicinal Plant Processing

eFood, Volume 7, Issue 1, February 2026.
From farm to pharma, this review details the engineering of quality in medicinal plants through a science‐driven approach: it first elucidates how genetic and environmental factors inscribe the plant's phytochemical and phytopharmacological profile before harvest, and then dissects the postharvest techniques and technologies—chemical and thermal pre ...
Elyas Aryakia
wiley   +1 more source

3,3′-[(1E,1′E)-Hydrazine-1,2-diylidenebis(ethan-1-yl-1-ylidene)]bis(4-hydroxy-6-methyl-2H-pyran-2-one)

IUCrData, 2019
The title compound, C16H16N2O6, lies about an inversion centre at the mid-point of the N—N bond. The molecule features two intramolecular O—H...N and two C—H...O hydrogen bonds, each of which forms an S(6) ring motif. In the crystal, molecules are linked
Abouelhaoul El Alami, Sdassi Hamid, Abdellatif El Kihel, Mohamed Saadi, Lahcen El Ammari   +4 more
doaj   +1 more source

Synthesis of pyrrole derivatives of serinol for functionalization of carbon allotropes [PDF]

, 2017
N-Pyrrole-based heterocycles are present in many natural products,[1] medicinal agents,[2] and functional materials,[3,4] therefore substantial attention has been paid to develop efficient methods for pyrroles synthesis.
Barbera, Vincenzina, Citterio, Attilio, Galimberti, MAURIZIO STEFANO, Leonardi, Gabriella, Sebastiano, Roberto, Terraneo, Giancarlo, Truscello, Ada, Valerio, ANTONIO MARCO   +7 more
core  

7,7′-Dihydroxy-4,4′-dimethyl-3,4-dihydro-2H,2′H-4,6′-bichromene-2,2′-dione

Acta Crystallographica Section E, 2011
The title compound, C20H16O6, which contains one chiral centre, crystallizes as a racemate. The mean planes of the two coumarin units make a dihedral angle of 88.07 (2)°.
M. Ramos Silva, Ali Mohammed Malla, Akhtar Ali, Mehtab Parveen, P. S. Pereira Silva   +4 more
doaj   +1 more source

Human Immunodeficiency Virus Gag and protease: partners in resistance. [PDF]

, 2012
Human Immunodeficiency Virus (HIV) maturation plays an essential role in the viral life cycle by enabling the generation of mature infectious virus particles through proteolytic processing of the viral Gag and GagPol precursor proteins.
Fun, Axel, Nijhuis, Monique, Verheyen, Jens, Wensing, Annemarie MJ   +3 more
core   +2 more sources

Activation of the Nuclear Factor E2-Related Factor 2 Pathway by Novel Natural Products Halomadurones A–D and a Synthetic Analogue

Marine Drugs, 2013
Two novel chlorinated pyrones, halomadurones A and B, and two novel brominated analogues, halomadurones C and D, were isolated from a marine Actinomadura sp. cultivated from the ascidian Ecteinascidia turbinata.
Thomas P. Wyche, Miranda Standiford, Yanpeng Hou, Doug Braun, Delinda A. Johnson, Jeffrey A. Johnson, Tim S. Bugni   +6 more
doaj   +1 more source

Syntheses of 3-[(Alkylamino)methylene]-6-methyl-1Hpyridine-2,4-diones, Fluorescence Probes 3-Substituted 7-Methyl-6H-pyrano[3,2-c]pyridine-2,5-diones, and Tetrahydro-6H-2,10-dioxa-9-azaanthracen-1-ones [PDF]

, 2014
Various condensation and ring-closing reactions were used for the syntheses of 3-[(alkylamino)methylene]-6-methylpyridine-2,4(1H,3H)-diones, bicyclic pyridinones, and tricyclic morpholinopyrones. For instance, 3-[(dialkylamino)methylene]-6-methylpyridine-
Chang, Kyeong-ok, Desper, John, Gunaratna, Medha J., Hua, Duy H., Jin, Lee-Way, Kikuchi, Daisuke, Kim, Yunjeong, Maezawa, Izumi, Prior, Allan M.   +8 more
core   +1 more source

Synthetic and Structure-Activity Relationship of Insecticidal Bufadienolides

Natural Product Communications, 2014
A new synthetic analog of bufadienolide, methyl isobryophyllinate A ( 1 ), and a known synthetic analog, methyl isobersaldegenate-1,3,5-orthoacetate ( 2 ), were obtained by methanolysis of bryophyllin A ( 3 ) and bersaldegenin-1,3,5-orthoacetate ( 5 ) in
Ace Tatang Hidayat, Achmad Zainuddin, Danar Dono, Wawan Hermawan, Hideo Hayashi, Unang Supratman   +5 more
doaj   +1 more source

The Synthesis and Bioactivity Study of Anthraquinones, And the Isolation of Bioactive Compounds from Leea Indica (Burm.F.) Merr. [PDF]

, 2005
Damnacanthal and nordamnacanthal were synthesized due to their interesting property as cytotoxic agents against several cancer cell-lines. Friedel-Craft condensation reaction has been used to prepare anthraquinone back-bone in view of its less ...
Saha, Koushik
core