CONSTITUENTS OFERYTHRINA SIGMOIDEA

. The study of the secondary metabolites of the chloroform extract of the stem wood of Erythrina sigmoidea afforded a new compound a -sophoradiol (1), and the known compounds: acetate of b -amyrin (2), acetate of oleanolic acid (3), n-isocosanyl-isocosanoate (4), and n-hexatetracontanol (5). Their structures were characterised by spectroscopic methods. (Received February 12, 2001, revised July 3, 2001) Bull.Chem.Soc.Ethiop. 2001, 15(2), 151-15

Constituents of <i>erythrina sigmoidea</i>

The study of the secondary metabolites of the chloroform extract of the stem wood of Erythrina sigmoidea afforded a new compound a-sophoradiol (1), and the known compounds: acetate of b-amyrin (2), acetate of oleanolic acid (3), n-isocosanyl-isocosanoate (4), and n-hexatetracontanol (5). Their structures were characterised by spectroscopic methods

Oxidative burst inhibition, cytotoxicity and antibacterial acriquinoline alkaloids from Citrus reticulate (Blanco)

Fomani M, Ngeufa Happi E, Nouga Bisoue A, et al. Oxidative burst inhibition, cytotoxicity and antibacterial acriquinoline alkaloids from Citrus reticulate (Blanco). Bioorganic &amp; Medicinal Chemistry Letters. 2015;26(2):306-309

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The potential of anti-malarial compounds derived from African medicinal plants. Part I: A pharmacological evaluation of alkaloids and terpenoids Amoa Onguéné et al

Two new 30-norfriedelane triterpenes from Caloncoba glauca (P. Beauv.) Gilg (Achariaceae)

Ndoumbe Tamba C, Tsopgni WDT, Fotso BSH, et al. Two new 30-norfriedelane triterpenes from Caloncoba glauca (P. Beauv.) Gilg (Achariaceae). Natural Product Research . 2023.The chemical investigation of the methanolic root extract of Caloncoba glauca (P. Beauv.) Gilg exhibited two new 30-norfriedelane triterpenes, glaucalactones A and B (1-2), together with eight known compounds, caloncobalactone (3), friedelin (4), friedelanol (5), 3-oxo-friedelan-28-oic acid (6), stigmasterol (7), beta-sitosterol (8), beta-sitosterol-3-O-beta-D-glucopyranoside (9) and pentacosanoic acid (10). The structures of the isolates were elucidated by extensive spectroscopic and spectrometric analyses (1D and 2D NMR, ESI-MS) and by comparison with previously reported data. All the compounds were tested for their antioxidant, antifungal and antibacterial activities. Compound 1 displayed weak antibacterial effect with MIC value of 125mug/mL against Staphylococcus aureus and Escherishia coli. Compound 6 exhibited moderated antifungal activity against Candida krusei with MIC value of 62.5mug/mL. All the isolates were found to be inactive as antioxidants in the DPPH, ABTS and FRAP assays

Ficusanolide A and ficusanolide B, two new cinnamic acid derivative stereoisomers and other constituents of the stem barks of Ficus exasperata Vahl. (Moraceae)

Tameye SCP, Mbeunkeu ABD, Fouokeng Y, et al. Ficusanolide A and ficusanolide B, two new cinnamic acid derivative stereoisomers and other constituents of the stem barks of Ficus exasperata Vahl. (Moraceae). Phytochemistry Letters. 2021;43:150-153.Phytochemical investigation of the stem barks of Ficus exasperata Vahl. (Moraceae) led to the isolation of two new cinnamic acid derivatives stereoisomers, named ficusanolide A (1) and ficusanolide B (2) along with twelve known compounds: ficusanol (3), umbelliferone-6-carboxylic acid (4), oxypeucedanin hydrate (5), marmesin (6), decursinol (7), beta-amyrin acetate (8), lupeol (9), betulinic acid (10), ursolic acid (11), a mixture of stigmasterol (12) and beta-sitosterol (13), sitosteryl-3-O-beta-D-glucopyranoside (14); and one hemisynthetic derivative : per acetylated betulinic acid (15). Their structures were established by the means of their physical data (melting point, rotatory power), their spectroscopic data, particularly IR, NMR (1H, 13C, DEPT, COSY, HSQC and HMBC) data, and HR-ESIMS data. Crude extract, compounds 1, 2, 3, 5, 6, 7, 9, 10, 11, as well as the semisynthetic derivative 15 were evaluated for their cytotoxic activity on the human cervix carcinoma cell line KB-3-1 and the human colon cancer cell line HT-29. Ursolic acid 11 showed a moderate activity on both cancer cells tested with IC50s of 50.9 mu M and 34.4 mu M respectively

Two new friedelane lactones from the roots of Caloncoba glauca (Flacourtiaceae) and evaluation of their cardiotonic activity on isolated frog & rsquo;s heart

Nko'o MHJ, Noulala CGT, Tsala DE, et al. Two new friedelane lactones from the roots of Caloncoba glauca (Flacourtiaceae) and evaluation of their cardiotonic activity on isolated frog &amp; rsquo;s heart. Phytochemistry Letters. 2021;42:27-35.Two new friedelane triterpenoids, 20,20-dimethyl-3,27-dioxo-(D:A)-friedo-olean-27,22?-lactone (20,20-dimethylglaucalactone) (1) and 3?-ethanoyloxy-30-nor-(D:A)- friedo-olean-20(29)-en-27,22?-lactone (3-acetoxyglaucalactone) (2) and four known compounds (3?6) were isolated from the methanolic extract of the roots of Caloncoba glauca (P. Beauv.) Gild (Flacourtiaceae). Their structures were determined by comprehensive spectroscopic analyses (1D and 2D NMR in addition to HRESI-MS). The relative configuration of the 22-oxymethine was determined from the NOESY spectrum. The cardiotonic effects of the crude extract and isolated compounds were tested. The results suggest that the crude extract and 3-acetoxyglaucalactone (2) induced an interesting cardiotonic activity by exerting positive inotropic and chronotropic effects, which might be derived from the direct stimulation of the 13-adrenergic pathway through 131-adrenergic receptors or opening of the calcium channel

Coumarinolignoid and Indole Alkaloids from the Roots of the Hybrid Plant Citrus &times; paradisi Macfad (Rutaceae)

A phytochemical investigation of the roots of Citrus &times; paradisi Macfad. (Rutaceae) led to the isolation of two new compounds, namely 1-formyl-5-hydroxy-N-methylindolin-1-ium (1) and decyloxycleomiscosin D (2), along with ten known compounds: 1,1-dimethylpyrrolidin-1-ium-2-carboxylate (3), furan-2,3-diol (4), 5-methoxyseselin (5), umbelliferone (6), scopoletin (7), citracridone I (8), citracridone II (9), citracridone III (10), limonin (11) and lupeol (12). The structures were determined through the comprehensive spectroscopic analysis of 1D and 2D NMR and EI- and ESI-MS, as well as a comparison with the published data. Notably, compounds 3 and 4 from the genus Citrus are reported here for the first time. In addition, the MeOH extract of the roots and compounds 1&ndash;7 were screened against the human adenocarcinoma alveolar basal epithelial cell line A549 and the Caucasian prostate adenocarcinoma cell line PC3 using the MTT assay. While the extract showed significant activity, with IC50 values of 35.2 and 38.1 &micro;g/mL, respectively, compounds 1&ndash;7 showed weak activity, with IC50 values of 99.2 to 250.2 &micro;M and 99.5 to 192.7 &micro;M, respectively

P21 Gastroprotective and hepatoprotective effects of the fruit peels extract of a hybrid plant Citrus x paradisi Macfad. (Rutaceae) against ethanol-induced-gastric ulcer and paracetamol-induced-hepatitis on Wistar strain male rats.

Introduction: Diseases of the digestive system and liver are the leading cause of hospitalization worldwide, at around 12.2%. In particular hepatotoxicity which affects more than fifty million people worldwide and peptic ulcer disease. Moreover, the therapies used for the treatment of these diseases are not only very expensive but also present numerous   undesirable side effects (hypersensitivity, arrhythmia, impotence, hematopoietic changes). The use of medicinal plants and herbal medicine probably make a considerable contribution. And the present study demonstrates it. Material and Method: 200 and 400 mg of crude ethanolic fruit peel extract (EFPE) were administered by nasogastric tube to two groups of G and H rats consisting of 3 batches of 5 rats each. The 3 batches representing the neutral, negative and positive controls. Then, gastric ulcer and hepatitis was induced in rats according to the Kanbur and al.’s procedures. Results and Discussion: The percentages of protection of the gastric mucosa are 6 - 7 times higher than those of rats pretreated with distilled water and close to nearly 90% than that of omeprazole at 20 mg / kg. At equal concentrations (200 mg / kg bw) the gastroprotective effect of the FFPE therefore appears to be 1.2 greater than that reported by Selmi et al., 2017 [5] on the fruit peels of the parent C. sinensis. The lowest serum transaminases (AST, ALT, ALP) levels were observed in rats pretreated with EFPE at 200 mg / kg bw. Oral administration of 200mg/kg bw of the EFPE equally twice that of silymarin would lead to a decrease in transaminases comparable to that of silymarin administered at 100 mg / kg used as a reference sample. The hepatoprotective effect of EFPE are similar with those observed on seeds by Udom et al., 2018 [6]. These results are consistent with macroscopic and histological examination of the damaged tissue. Conclusion: The EFPE of Citrus x paradisi has gastroprotective and hepatoprotective effects which would be comparable to those of Omeprazole and Sylmarin orally administered