Abstract.Yunita E, Kurniati T, Rosa FL, Melati P, LestariN. 2022. Short Communication: Analysis of detected metabolites compounds from the crude extract of Rimau Gerga Lebong orangesfruit (Citrus reticulata ‘RGL’) using LC-QTOF-MS/MS. Biodiversitas 23: 3778-3783. Rimau Gerga Lebong (RGL) oranges are the leading commodity in Bengkulu Province. However, the content of bioactive compounds in RGL oranges has not been widely reported. This study aims to identify the flavonoid, alkaloids, and tannins from the ethanol extract of RGL oranges. The results of further identification will be used as a reference in further research on molecular docking in various biological activities. Chemical compounds were identified using qualitative tandem liquid chromatography quadrupole time of flight mass spectrometry (LC-QTOF-MS/MS). The measurement of vitamin C levels was carried out using High-Performance Liquid Chromatography (HPLC). The results showed 25 identified compounds, consisting of 6 compounds belonging to the alkaloid group, 17 from the flavonoid group, and 2 from the tannin group. The alkaloid group compounds were 2?, 3?, 6exo-trihydroxy nortopane, 2?, 3?-dihydroxy nortopane, isosalsolin,3?-dihydrocadambine, chelidimerine, and oleracein D. The compounds from identified flavonoid group were chebuloside, neokurarinol, rutinoside, flavonone, glucoside, licochalcone, viscumneoside, and pinnatifinoside. The identified tannins are corilagin and moracin. These compounds that have been identified have biological activity potential as antioxidants, anti-asthma, anti-dementia, and anticancer. The vitamin C content of the ethanol extract of RGL oranges was 0.02±0.0001%. This vitamin C supports the antioxidant activity of RGL orange.
