Remy Bertrand Teponno

A bioassay-guided chemical investigation of the endophytic fungus F5 resulted in the discovery of two novel sesquiterpenes, chamilactones A and B ( and ), with a new 9,10-seco-15--isoilludalane carbon skeleton,...

A new saponin namely diosgeninoside (25 -spirost-5-en-3--[--glucopyranosyl (1→2) - --glucuronic acid]) and a new fatty acid betacic acid: ()-8(*),9(*),10(*)-trihydroxy-11-octadecenoic acid together with six known compounds: --coumaroyl tyramine, ergosta-7,22-dien35triol, -sitosterol, and...

Four previously unreported triterpenoid saponins named 3β-hydroxy-23-oxours-12-en-28-oic acid 28--β--glucopyranosyl ester (mannioside G) (), 23--acetyl-3β-hydroxyurs-12-en-28-oic acid 28--β--glucopyranosyl ester (mannioside H) (), ursolic acid 28--[α--rhamnopyranosyl-(1→4)-β--glucopyranosyl-(1→6)-β--glucopyranosyl] ester (mannioside I) (), and 3β-hydroxy-23-oxolup-20(29)-en-28-oic acid...

Besides plants and animals, the fungal kingdom consists of several species characterized by various forms and applications. Fungi are amazing producers of bioactive natural products with applications in medicine and...

The fast spread of antibiotic resistance results in the requirement for a constant introduction of new candidates. Pentangular polyphenols, a growing family of actinomycetes-derived aromatic type II polyketides, have attracted...

The genus is a rich source of physiologically active secondary metabolites, including a novel compound named 21-methylene-24-ethylidene lophenol, alongside 15 known compounds. These compounds were characterized using different spectroscopic techniques....

Five unusual alkaloids featuring a pyrrolo[1,2-a]quinolone skeleton (pyrroloquinolones B-F, 1-5) were isolated from the ethanol extract of the whole plant of Vernonia glabra (Steetz) Vatke, along with sixteen known compounds....

Chemical exploration of solid-state cultures of the polypore afforded two new C31 lanostane-type triterpenoid glycosides, forpiniosides B () and C () together with two known derivatives, namely 3-epipachymic acid ()...

Chemical study of the methanol extract from the leaves of led to the isolation of a new phenolic glucoside () along with fifteen known secondary metabolites namely shanzhiside methyl ester...

From the n-butanol soluble fraction of the ethanol extract of the medicinal plant Olax subscorpioidea, a previously unreported rotameric biflavonoid glycoside constituted of 4'-O-methylgallocatechin-(4α → 8)-4'-O-methylgallocatechin as aglycone named olasubscorpioside...