V. Jong

Publications28
h-index7
Citations118
Highly Influential Citations7
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A new chromanone acid from the stem bark of Calophyllum teysmannii
TLDR
The preliminary assay results revealed that all the test compounds displayed potent inhibitory activity against HeLa cancer cell line, in particular with compound 1 which exhibited the highest cytotoxic activity comparable to the positive control used, cisplatin. Expand
A new coumarin from stem bark of Calophyllum wallichianum
TLDR
The hexane and chloroform extracts of the plant were found to be inhibitors to the growth of Bacillus megaterium, Bacillus cereus, Bacilus pumilus and Bacillus subtilis. Expand
Effect of Solvents on Phytochemical Concentrations and Antioxidant Activity of Garcinia benthamiana Stem Bark Extracts
ABSTRACT The effect of solvents of various polarities (hexane, chloroform, ethyl acetate, and methanol) on phytochemical concentrations and antioxidant activities of stem bark of Garcinia benthamiana… Expand
Articles : A New Pyranoxanthone Inophyllin B from Calophyllum inophyllum
TLDR
The isolation, structural elucidation and bioassay data for Inophyllin B and brasilixanthone B are reported, indicating weak toxicity to the larvae of Aedes aegspti. Expand
In vitro cytotoxic activity of isolated compounds from Malaysian Calophyllum species
Cancer is a leading cause of death worldwide. In our continuing search for new anticancer agents, four Malaysian Calophyllum species, namely C. castaneum, C. teysmannii, C. canum, and C.… Expand
A new xanthone from Garcinia nitida
TLDR
The structures of these compounds were established using mainly 1-D and 2-D NMR spectroscopy while molecular masses were determined via MS techniques; 1 is a new compound. Expand
Inophyllin A, a new pyranoxanthone from Calophyllum inophyllum (Guttiferae)
TLDR
The authors report here the isolation of and structural elucidation for Inophyllin A as well as its toxicity test result, and the discovery of this new natural product from the unexploited Malaysian forest will certainly contribute to the search for potential natural larvicides. Expand
A new pyranoxanthone from Garcinia nervosa
TLDR
Phytochemical studies on the stem bark of Garcinia nervosa have resulted in the discovery of one new pyranoxanthone derivative, 1,5-dihydroxyxanthone, and five other compounds, including 6-deoxyisojacareubin, 12b-hydroxy-des-D-garcigerrin A, stigmasterol, and β-sitosterol. Expand
Benzophenone constituents from the roots of Garcinia eugenifolia
Our recent phytochemical investigation on the roots of Garcinia eugenifolia gave a new benzophenone,( 3,4-dihydroxyphenyl)(3-hydroxy-5-methoxyphenyl) methanone(1), one other benzo-phenone,(3-… Expand
The pyranoxanthone inophyllin A induces oxidative stress mediated-apoptosis in Jurkat T lymphoblastic leukemia cells.
TLDR
Data demonstrate that INO-A induced early oxidative stress, DNA damage and loss of MMP which subsequently led to the activation of an intrinsic pathway of apoptosis in Jurkat cells. Expand
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