Abstract
Phenols, flavonoids, and anthocyanins are compounds that reported play important roles in plant defence mechanism system. Antioxidant activity is mostly derived from these phytochemical groups, which have a wide range of pharmaceutical properties, including antimicrobial, antitumor, anti-inflammatory, antipyretic, anti-allergy, anti-fertility, hypoglycemic, anti-histamine, antioxidant, antiviral, analgesic, anti-ulcerogenic, nephroprotective, antidiabetic, immuno-secretory, cardiovascular, anti-platelet aggregation, antibacterial, anticancer, and hepatoprotective activities. However, these compounds in Solanum lasiocarpum from Borneo areas are remaining unclear. In this experiment, we performed comprehensive evaluation on effect of extraction solvents on phenols, flavonoids, and anthocyanin's contents and further on the scavenging activity (2,2-diphenyl-1-picrylhydrazyl-hydrate, DPPH; 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid), ABTS; and ferric-reducing antioxidant power, FRAP). High phenolic, flavonoid and anthocyanin contents be found in low polar solvent. Antioxidant assay showed acetone was higher activity with IC50 of 6.36 mg/mL compared to methanol (12.1 mg/mL) and hexane (17.8 mg/mL). Furthermore, liquid chromatography mass spectrometry quadrupole-time of flight (LCMS Q-TOF) mass spectrometer detected N-Acryloylglycine, butoctamide hydrogen succinate, eruberin B, emmotin A and N-Cyclohexanecarbonylpentadecylamine that important in natural polymers, serve as sleep disorders treatment agents, anti-fibrotic property, immunomodulatory activity, and act as differentiator between N-palmitoylethanolamine-hydrolyzing acid amidase (NPAA) compared to fatty acid amide hydrolase (FAAH), respectively. The limitation of this research is the assessment of antioxidant properties related to the polarity of the extraction solvent. Polar solvents may exhibit high scavenging activity, but phenolic compounds, flavonoids, and anthocyanins are found in higher concentrations in non-polar solvents. We encourage further investigation into phytochemical profiles due to the abundance from non-polar solvents.
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