Abstract:
This research aimed to study the antibacterial, antiviral, anti-MC99+1A2 cell, and anticancer cell activities of hexane, ethyl acetate, and methanol extracts from the leaves, twigs, and stems of Psuduvaria phuyensis , using standard drugs as comparative agents. The separation and characterization of compounds from crude extracts revealed three main pure compounds: stigmasterol, b-sitosterol, and trans, trans-cyclohexane-1,2,4,5tetrahydrol monohydrate. The antibacterial activity test showed that trans, transcyclohexane-1,2,4,5-tetrahydrol monohydrate had minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values of 2/<2 mg/mL for all bacterial strains tested in the experiment. Additionally, all extracts demonstrated significant activity against S. typhimurium. Hexane and ethyl acetate extracts from the leaves and twigs of P. phuyensis demonstrated strong anti-HIV activity through a reverse transcriptase mechanism, with inhibition percentages of 90.50% and 89.36%, respectively. The ethyl acetate extract from the stem shown the most significant activity against MC99+1A2 cells, with an IC50 value of 50.22 μM and an EC50 value of 10.5 μM. The cytotoxicity study on cancer cells showed that the hexane extract from the stem demonstrated the highest cytotoxicity against FaDu cancer cells, with an ED50 value of 13.07 μg/mL. The structure determination of the isolated compounds from this plant was conducted using spectroscopy techniques and X-ray diffraction crystallography