Results 51 to 60 of about 1,516 (198)

Dragmacidin G, a Bioactive Bis-Indole Alkaloid from a Deep-Water Sponge of the Genus Spongosorites

open access: yesMarine Drugs, 2017
A deep-water sponge of the genus Spongosorites has yielded a bis-indole alkaloid which we have named dragmacidin G. Dragmacidin G was first reported by us in the patent literature and has recently been reported by Hitora et al. from a sponge of the genus
Amy E. Wright   +11 more
doaj   +1 more source

Alkaloids with Anti-Onchocercal Activity from Voacanga africana Stapf (Apocynaceae): Identification and Molecular Modeling

open access: yesMolecules, 2020
A new iboga-vobasine-type isomeric bisindole alkaloid named voacamine A (1), along with eight known compounds—voacangine (2), voacristine (3), coronaridine (4), tabernanthine (5), iboxygaine (6), voacamine (7), voacorine (8) and conoduramine (9)—were ...
Smith B. Babiaka   +11 more
doaj   +1 more source

Synthesis of Pseudellone Analogs and Characterization as Novel T-type Calcium Channel Blockers

open access: yesMarine Drugs, 2018
T-type calcium channel (CaV3.x) blockers are receiving increasing attention as potential therapeutics for the treatment of pathophysiological disorders and diseases, including absence epilepsy, Parkinson’s disease (PD), hypertension, cardiovascular
Dan Wang   +4 more
doaj   +1 more source

Antimicrobial, antimycobacterial and antibiofilm properties of Couroupita guianensis Aubl. fruit extract [PDF]

open access: yes, 2012
BACKGROUND: Couroupita guianensis Aubl. (Lecythidaceae) is commonly called Ayahuma and the Cannonball tree. It is distributed in the tropical regions of northern South America and Southern Caribbean. It has several medicinal properties.
Chandrasekar Balachandran   +7 more
core   +1 more source

Bisleuconothine A protects periodontal tissue via the regulation of RANKL expression and infiltration of inflammatory cells [PDF]

open access: yes, 2020
Purpose: To investigate the protective effect of bisleuconothine A on periodontal tissue in rats and the mechanism involved. Methods: Adult male Sprague Dawley rats (n = 32) weighing 180 - 200 g (mean weight, 190 ± 10 g) were randomly assigned to four ...
Sun, Ping, Sun, Qiang, Wang, Fang
core   +2 more sources

Photoprotective Activity of Topsentin, A Bis(Indole) Alkaloid from the Marine Sponge Spongosorites genitrix, by Regulation of COX-2 and Mir-4485 Expression in UVB-Irradiated Human Keratinocyte Cells

open access: yesMarine Drugs, 2020
Skin is an important barrier to protect the body from environmental stress. However, exposure to ultraviolet radiation (UV) and various environmental oxidative stresses can cause skin inflammation.
Jiyoung Hwang   +5 more
doaj   +1 more source

Mitotic cell death induction by targeting the mitotic spindle with tubulin-inhibitory indole derivative molecules [PDF]

open access: yes, 2017
Tubulin-targeting molecules are widely used cancer therapeutic agents. They inhibit microtubule-based structures, including the mitotic spindle, ultimately preventing cell division.
Coluccia, Antonio   +10 more
core   +1 more source

Transcription Factors in Alkaloid Engineering [PDF]

open access: yes, 2021
Plants produce a large variety of low-molecular-weight and specialized secondary compounds. Among them, nitrogen-containing alkaloids are the most biologically active and are often used in the pharmaceutical industry. Although alkaloid chemistry has been
Sato, Fumihiko, Yamada, Yasuyuki
core   +1 more source

Chapter 3 Noniridoid Bisindole Alkaloids

open access: yes, 1995
This chapter discusses that indole is a reactive nucleus prone to dimerization when it is isolated or a part of tryptamine or tryptophan, which themselves are reactive toward many functionalities. For these reasons, bisindoles, the majority of which are of iridoid origin, are frequently isolated in nature. Besides these “dimers,” there exists a growing
Sapi, J., Massiot, G.
openaire   +1 more source

2,3‐Dichloro‐5,6‐Dicyano‐1,4‐Benzoquinone (DDQ)‐Mediated CC Bond Formation: Redox Strategies from Stoichiometric to Catalytic Systems

open access: yesChemistryOpen, Volume 15, Issue 4, April 2026.
2,3‐Dichloro‐5,6‐dicyano‐1,4‐benzoquinone serves as a versatile oxidant and redox catalyst for CC bond formation through hydride abstraction or single‐electron transfer. Stoichiometric and catalytic systems enable benzylic, allylic, and aromatic CH activation under mild, metal‐free conditions, providing sustainable routes to complex and bioactive ...
Dohoon Cha, Sun‐Joon Min
wiley   +1 more source

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