Results 291 to 300 of about 435,947 (354)

Pyrrolizidine Alkaloids

2018
Naturally occurring pyrrolizidine alkaloids (PAs) are isolated from plants and other sources. The interest of the scientific community in these compounds owes itself to their high toxicity and biological activity, as well as to the challenge of synthesizing their pyrrolizidine scaffold.
Joaquín, Tamariz, Eleuterio, Burgueño-Tapia, Miguel A, Vázquez, Francisco, Delgado   +3 more
openaire   +2 more sources

Role of plant alkaloids on human health: A review of biological activities

Materials Today Chemistry, 2018
Alkaloids are plant secondary metabolite. They are well known nitrogen-containing natural bioactive compounds. Cutting edge research is going on alkaloids to unravel novel therapeutic approaches.
B. Debnath, W. Singh, Manik Das, Sanchari Goswami, Maheshwer Singh, D. Maiti, K. Manna   +6 more
semanticscholar   +1 more source

Diterpenoid alkaloids

Natural Product Reports, 2010
The lasting attention that researchers have devoted to diterpenoid alkaloids is due to their various bioactivities and toxicities, structural complexity, and intriguing chemistry. From 1998 to the end of 2008, more than 300 new diterpenoid alkaloids were isolated from Nature.
Feng-Peng, Wang, Qiao-Hong, Chen, Xiao-Yu, Liu   +2 more
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Natural indole‐containing alkaloids and their antibacterial activities

Archiv der Pharmazie, 2020
As the growth in resistance to bacterial infection treatments poses a grave threat to global health in the 21st century, there is a constant need to explore novel antibacterial agents that have the ability to overcome drug resistance.
Yang Liu, Ying Cui, Liyan Lu, Yufeng Gong, W. Han, Guishun Piao   +5 more
semanticscholar   +1 more source

Bisbenzylisoquinoline Alkaloids

2019
The present review covers the literature on bisbenzylisoquinoline alkaloids from 1999 through early 2018. About 500 natural products belong to this large alkaloid class, of which 65 were characterized for the first time in the period covered by this chapter.
Carina, Weber, Till, Opatz
openaire   +2 more sources

The influence of alkaloids on oxidative stress and related signaling pathways.

Free Radical Biology & Medicine, 2019
Alkaloids have always attracted scientific interest due to either their positive or negative effects on human beings. This review aims to summarize their antioxidant effects by both classical in vitro scavenging assay and at the cellular level.
K. Macáková, Rita Afonso, L. Saso, P. Mladěnka   +3 more
semanticscholar   +1 more source

Green and efficient extraction of different types of bioactive alkaloids using deep eutectic solvents

Microchemical journal (Print), 2019
Deep eutectic solvents (DESs) have attracted increasing attention as eco-friendly and efficient alternatives to conventional organic solvents. In this study, five herbal medicines (HMs) including Caulis sinomenii, Coptis chinensis, Stephania tetrandra ...
Zheng‐Meng Jiang, Lan-Jin Wang, Zhao Gao, Bo Zhuang, Q. Yin, Ehu Liu   +5 more
semanticscholar   +1 more source

Alkaloid synthesis

Accounts of Chemical Research, 1968
Abstract
openaire   +1 more source

Quaternary Protoberberine Alkaloids

ChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Lenka, Grycová, Jirí, Dostál, Radek, Marek   +2 more
openaire   +2 more sources

Sabadilla alkaloids. I. Extraction of total alkaloids

Journal of the American Pharmaceutical Association (Scientific ed.), 1949
A method is described by which the total sabadilla alkaloids were extracted from the seed and by which a partial separation of the crude alkaloidal mixture into four crude fractions was accomplished. Extraction of the seed with Skelly B removed the oil almost completely, in amounts up to 20 per cent, together with alkaloidal Fraction A, which was ...
C E, POETSCH, L M, PARKS
openaire   +2 more sources