Results 61 to 70 of about 5,616 (175)

Seasonal Variation of Bioactive Alkaloid Contents in Macleaya microcarpa (Maxim.) Fedde

Molecules, 2011
Macleaya microcarpa (Maxim.) Fedde belongs to the genus Macleaya, family Papaveraceae. Together with the better known and more frequently studied species M. cordata (Willd.) R. Br. it is a main source of quaternary benzo[c]phenanthridine alkaloids. Using
Jana Gregorová, Pavel Musil, Jana Urbanová, Kristýna Pěnčíková, Eva Táborská   +4 more
doaj   +1 more source

Visible-light photoredox catalyzed synthesis of pyrroloisoquinolines via organocatalytic oxidation/[3 + 2] cycloaddition/oxidative aromatization reaction cascade with Rose Bengal

Beilstein Journal of Organic Chemistry, 2014
Pyrrolo[2,1-a]isoquinoline alkaloids have been prepared via a visible light photoredox catalyzed oxidation/[3 + 2] cycloaddition/oxidative aromatization cascade using Rose Bengal as an organo-photocatalyst.
Carlos Vila, Jonathan Lau, Magnus Rueping   +2 more
doaj   +1 more source

Isolation and X-ray Crystal Structure of Tetrahydroisoquinoline Alkaloids from Calycotome Villosa Subsp. intermedias

Molecules, 2004
Two tetrahydroisoquinoline alkaloids were extracted from the alkaloid fraction of a methanol extract of the seeds of Calycotome Villosa Subsp. intermedia.
Mohammed Lachkar, Brahim El Bali, Michael Bolte, Rachid El Alami, Mohamed Bouktaib, Ibtissam Messouri, Ali El Antri   +6 more
doaj   +1 more source

DEHYDROPUNTARENINE AND DEHYDROSAULATINE TO NEW ISOQUINOLINE ALKALOIDS FROM ROOTS OF BERBERIS ACTINACANTHA [PDF]

Journal of Sciences, Islamic Republic of Iran, 1990
The isolation and characterization of two new isoquinoline alkaloids, Dehydropuntarenine and Dehydrosaulatine, obtained during the column chromatography of an alkaloidal fraction from the roots of B. Actinacantha (Berberidaceae) are described.
doaj  

In silico Investigation of the Anticancer Activity of Natural Isoquinoline Alkaloids Targeting the Monoamine Oxidase a Enzyme

AUIQ Complementary Biological System
Monoamine oxidase A (MAO-A) has recently been identified as a candidate for cancer therapy due to its roles in tumor development and growth. Conventional approaches for the discovery of MAO-A inhibitors are both costly and time-consuming.
Reham A.Al-Anssari, Anwar H.Ali, OlaAdel Al-Saad, Shaker A.N. Al-Jadaan   +3 more
doaj   +1 more source

Isoquinoline Alkaloids from Active against Plant Microbial Pathogens

Natural Product Communications, 2009
Bioassay-guided fractionation of the crude extract of the whole plant of Macleaya cordata R. Br. led to the isolation of four alkaloids, which were identified as sanguinarine (1), chelerythrine (2), protopine (3) and α-allocryptopine (4) on the basis of ...
Hao Liu, Jihua Wang, Jianglin Zhao, Shiqiong Lu, Jingguo Wang, Weibo Jiang, Zhanhong Ma, Ligang Zhou   +7 more
doaj   +1 more source

Isoquinoline Alkaloids and Homoisoflavonoids from Bak and Bak

Natural Product Communications, 2008
The powdered bulbs and leaves of Drimiopsis barteri yielded two novel isoquinoline alkaloids: 5-hydroxy-7,2′,3′,4′-tetramethoxy{2H-1-}benzopyran [4,3-c]isoquinoline and 6-hydroxy-7,2′,3′,4′-tetramethoxy{2H-1-}benzopyran [4,3-c]isoquinoline, three new ...
Dieudonne Ngamga, Josephine Bipa, Pearl Lebatha, Christabel Hiza, Joan Mutanyatta, Merha-Tibeb Bezabih, Pierre Tane, Berhanu M. Abegaz   +7 more
doaj   +1 more source

Cytotoxicity of Naturally Occurring Isoquinoline Alkaloids of Different Structural Types

Natural Product Communications, 2016
Forty-six isoquinoline alkaloids, of eleven structural types isolated in our laboratory, have been evaluated for their cytotoxicity against two cancer cell lines (Caco-2 and Hep-G2 cancer cells), as well as against normal human lung fibroblast cells ...
Jakub Chlebek, Ivo Doskočil, Daniela Hulcová, Kateřina Breiterová, Marcela Šafratová, Radim Havelek, Klára Habartová, Anna Hošt'alková, Tereza Volštatová, Lucie Cahliková   +9 more
doaj   +1 more source

Extracts from Traditional Chinese Medicinal Plants Inhibit Acetylcholinesterase, a Known Alzheimer’s Disease Target

Molecules, 2016
Inhibition of acetylcholinesterase (AChE) is a common treatment for early stages of the most general form of dementia, Alzheimer’s Disease (AD). In this study, methanol, dichloromethane and aqueous crude extracts from 80 Traditional Chinese Medical (TCM)
Dorothea Kaufmann, Anudeep Kaur Dogra, Ahmad Tahrani, Florian Herrmann, Michael Wink   +4 more
doaj   +1 more source

Nanoparticle formation of an antimicrobial peptide induced by sulfated β-cyclodextrin: Application to alkaloid encapsulation

Carbohydrate Polymer Technologies and Applications
The association of polyanionic β-cyclodextrin (βCD) derivatives with the nonaggregating polycationic antimicrobial peptide Dhvar4 was studied in water at 296 K without a buffer to explore their potential for forming nanoparticles capable of encapsulating
Zsombor Miskolczy, Mónika Megyesi, Beáta Mándityné Huszka, István Mándity, László Biczók   +4 more
doaj   +1 more source