Results 71 to 80 of about 80,153 (209)

Two Sulfur-Containing Isoquinoline Alkaloids From the Bryozoan Biflustra perfragilis

open access: yes, 1993
The bryozoan Biflustra perfragilis collected in Bass Strait has yielded two novel sulfur-containing isoquinoline alkaloids: 2-methyl-6,7-di(methylthio)isoquinoline-3,5,8 (2H)-trione (1a) and 2-methyl-6-methylthioisoquinoline-3,5,8(2H)trione (1b).
AJ Blackman   +3 more
core   +1 more source

Aporphine Alkaloids from (Annonaceae)

open access: yesNatural Product Communications, 2008
Guatteria species (Annonaceae) are rich in isoquinoline alkaloids that contain a restricted β-phenethylamine moiety and thus have potential as monoamine oxidase (MAO) inhibitors for the treatment of Alzheimer's and Parkinson's diseases.
María Rodríguez   +5 more
doaj   +1 more source

Cell‐Specific Expression and Cellular Compartmental Regulation in Camptothecin Biosynthesis

open access: yesPlant Biotechnology Journal, Volume 24, Issue 9, Page 5114-5130, September 2026.
ABSTRACT Plant secondary metabolites such as monoterpenoid indole alkaloids (MIAs) show tightly regulated biosynthesis and accumulation in specific organelles of distinct cell types. However, the cell‐specific expression patterns of anticancer MIA camptothecin biosynthetic genes in Ophiorrhiza pumila and the regulatory mechanisms of camptothecin ...
Xiaolong Hao   +12 more
wiley   +1 more source

Tropane alkaloids in food [PDF]

open access: yes, 2010
A large number of wild and cultured plants produce secondary metabolites that are toxic to humans and animals. Through accidental or intentional mixing of these plants with normal food and feed the consumers of these products will be exposed to the ...
Adamse, P., Egmond, H.P., van
core  

TLC Bioautography-guided Isolation and Antimicrobial, Antifungal Effects of 12 Alkaloids from Roots

open access: yesNatural Product Communications, 2017
Hylomecon japonica (Thunb.) Prantl. is a Chinese medicinal plant whose active components and their antimicrobial mechanism was studied by TLC bioautography-guided isolation and identification of 12 alkaloids and their antimicrobial activities evaluated ...
Xuanji Xue   +6 more
doaj   +1 more source

Applicability of a Monolithic Column for Separation of Isoquinoline Alkalodis from Chelidonium majus Extract

open access: yesMolecules, 2019
Isoquinoline alkaloids are the main group of secondary metabolites present in Chelidonium majus extracts, and they are still the object of interest of many researchers.
Michał Staniak   +6 more
doaj   +1 more source

The telomere‐to‐telomere gap‐free reference genome and DNA methylome unveil epigenetic regulation of proanthocyanidin biosynthesis during apricot fruit development

open access: yesThe Plant Journal, Volume 127, Issue 6, September 2026.
SUMMARY Apricot (Prunus armeniaca L.) is an economically significant fruit crop worldwide with remarkable germplasm diversity, and its fruit quality is primarily determined by key metabolites (e.g., sugars, organic acids, and flavonoids). However, current apricot genome assemblies remain incomplete, with substantial unanchored regions that hamper ...
Xu Qiang   +10 more
wiley   +1 more source

Pavine and isopavine alkaloids

open access: yes, 1987
Pavines and isopavines are two relatively small subgroups of the isoquinoline alkaloids, represented by 22 and 11 compounds, respectively. This chapter describes the occurrence and structure elucidation, synthesis, unnatural pavines and isopavines ...
Belkis Gözler, Gözler B.
core   +1 more source

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

open access: yesMolecules, 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   +4 more
doaj   +1 more source

Investigations of Natural Products from Bryozoa Inhabiting Aotearoa New Zealand [PDF]

open access: yes, 2012
Two species of bryozoa, Pterocella vesiculosa and Plumatella repens, were investigated in an endeavour to isolate and characterise novel secondary metabolites.
Andersen, Aaron John Christian
core  

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