A chemical investigation of the Glyphaea brevis leaves and of the Monodora myristica fruits led to the identification of thirteen compounds, seven linear long-chain aliphatic compounds, 1, 2, 4, 6, and 9-11, three steroids, 3a, 3b, and 7, two triterpenes, 5a and 5b, and one polyol, 8. The compounds 2 and 8, previously mentioned in the literature, are here characterized by their complete (1)H- and (13)C-NMR assignments. This is the first report of a full NMR assignment for linear fatty acid esters of aliphatic primary alcohols and for meso-erythritol. Compound 5b and 8 were isolated for the first time from plant extracts of the Tiliaceae family, and compounds 9-11 from the Annonaceae plant family. Our results constitute the basis for further chemotaxonomic studies on the two species.
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http://dx.doi.org/10.1002/cbdv.201100378 | DOI Listing |
Trop Life Sci Res
June 2023
Department of Biochemistry, Ahmadu Bello University, P.M.B 1069 Zaria, Kaduna State, Nigeria.
Malaria still remains a life-threatening parasitic disease with universal targets set for control and elimination. This study aimed to evaluate the antimalarial susceptibility of isolates and to selected antimalarial agents and column chromatographic subfractions of leaves extract and FTIR and GCMS of SF8. Trager and Jensen as well as World Health Organisation (WHO) standardised micro-test system methods were used to determine susceptibility on the patients' blood samples; Column chromatographic procedure was carried out to obtain 11 pooled fractions; FTIR and GCMS were used to determine functional groups and phytochemicals respectively.
View Article and Find Full Text PDFJ Nat Prod
May 2023
School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales 2522, Australia.
The 10 glyphaeaside alkaloids isolated from the roots of were originally purported as piperidine-based 1--alkylated iminosugars, with the A-, B-, and C-type glyphaeasides bearing l-DFJ, DGJ, and DNJ ring configurations, respectively. Subsequent investigations have revealed glyphaeaside C as being a pyrrolidine-based iminosugar with a DMDP ring configuration via total synthesis of the revised structure. In this work, side chain diastereomers of the originally purported structure of glyphaeaside C () and two related α-1--alkylated DNJ derivatives were synthesized from a common precursor, which was prepared in turn via stereoselective Grignard addition to a protected d-glycosylamine, followed by a reductive amination-cyclization sequence.
View Article and Find Full Text PDFBiomed Pharmacother
January 2022
Phytomedicine, Biochemical Pharmacology and Toxicology Laboratories, Department of Biochemistry, School of Life Sciences, The Federal University of Technology, Akure 340001, Nigeria. Electronic address:
This study assessed the fertility potential of methanol leaf extract of Glyphaea brevis (MGB) in rats exposed to 1,4-Dinitrobenzene (DNB), an environmental reprotoxicant. Male Wistar rats were orally exposed to 50 mg/kg DNB and administered 750 mg/kg MGB, 1500 mg/kg MGB or 300 mg/kg vitamin E for 21 days after 48 h of DNB exposure. Determination of serum reproductive hormone levels by enzyme-linked immunosorbent assays, evaluation of hematologic profile, computer-assisted sperm analyses (CASA) of sperm kinematics and morphology, assessment of testicular and spermatozoan antioxidant systems, and histopathological evaluation of reproductive tissues were performed.
View Article and Find Full Text PDFAndrologia
August 2019
Phytomedicine, Reproductive and Biochemical Toxicology Unit, Department of Biochemistry, Afe Babalola University, Ado-Ekiti, Nigeria.
Glyphaea brevis twigs (Spreng) Monach. (GBT) are used by local herb healers to manage male sexual fertility disorders. The aim of this study was to examine the effects of G.
View Article and Find Full Text PDFToxicol In Vitro
September 2019
Phytomedicine, Biochemical Pharmacology and Toxicology Laboratories, Department of Biochemistry, School of Sciences, PMB 704, The Federal University of Technology, Akure, Nigeria.
Previous studies have revealed that leaf extracts of Glyphaea brevis possess antioxidant activity but the bioactivity and mechanisms of action of its major constituents remain unknown. This study evaluated in vitro antioxidant and free radical scavenging activities of Glyphaea brevis twigs and leaves, and probable toxicity profile, pharmacological activities and mechanisms of action of major phytoconstituents in silico. Phytochemical screening detected saponins, tannins, steroids, anthraquinones, flavonoids, terpenoids and phenolics in the extracts.
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