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Minor secondary metabolic products from the stem bark of Plumeria rubra Linn. displaying antimicrobial activities.
Four new iridoids viz., plumeridoids A, B, and C and epiplumeridoid C were isolated from the stem bark of Plumeria rubra Linn. together with twenty-four known compounds viz., 1-(Expand
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Prenylated anthronoid antioxidants from the stem bark of Harungana madagascariensis.
Two new prenylated anthronoids, harunmadagascarins A and B, were isolated from the stem bark of Harungana madagascariensis along with six known compounds including two anthronoids: harunganol B andExpand
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Sapelenins G-J, acyclic triterpenoids with strong anti-inflammatory activities from the bark of the Cameroonian medicinal plant Entandrophragma cylindricum.
Four acyclic triterpene derivatives named sapelenins G-J (1-4), along with eight known compounds, sapelenins A-D, ekeberin D2 (5), (+)-catechin and epicatechin, and anderolide G, were isolated fromExpand
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Xanthones and oxepino[2, 3-b]chromones from three endophytic fungi.
Three new metabolites, microsphaeropsones A-C (1-3) with a unique oxepino[2,3-b]chromen-6-one (ring-enlarged xanthone) skeleton, were isolated from the endophytic fungus Microsphaeropsis species,Expand
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Bioactive Nitronaphthalenes from an Endophytic Fungus, Coniothyrium sp., and Their Chemical Synthesis
Four natural nitro metabolites, 1-hydroxy-5-methoxy-2-nitronaphthalene (2), 1,5-dimethoxy-4-nitronaphthalene (3), 1-hydroxy-5-methoxy-2,4-dinitronaphthalene (4), andExpand
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Antimicrobial prenylated anthracene derivatives from the leaves of Harungana madagascariensis.
Three new prenylated anthranoids, harunmadagascarins C (1) and D (2) and kenganthranol D (3), together with three known compounds (4-6) were isolated from the leaves of Harungana madagascariensis.Expand
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Antiplasmodial activities of furoquinoline alkaloids from Teclea afzelii
The study of the chemical constituents of the stem bark of Teclea afzelii (Rutaceae) has resulted in the isolation and characterization of four furoquinoline alkaloids, namely kokusaginine (1),Expand
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Tramadol--a true natural product?
We have independently investigated the source of tramadol, a synthetic analgesic largely used for treating moderate to severe pain in humans, recently found in the roots of the Cameroonian medicinalExpand
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Antimicrobial Coumarins from the Stem Bark of Afraegle paniculata
Eight compounds were isolated from the stem bark of the plant Afraegle paniculata. One of them, a dimethyl ether of S-trans-marmin (1), is reported as a new natural product. The structures wereExpand
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Minor secondary metabolites from the bark of Entandrophragma congoënse (Meliaceae).
Two new tirucallane-type triterpenoids were isolated from the bark of Entandrophragma congoënse (Meliaceae) along with five known compounds gladoral A, bipendensin,Expand
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