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Journal : EKSAKTA: Journal of Sciences and Data Analysis

Synthesis and Characterization of 2,3,4-Trihydroxy-5-methyl Xanthone as Antimalarial Compound Dhina Fitriastuti; Jumina Jumina; Priatmoko Priatmoko
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 16, ISSUE 2, August 2016
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol16.iss2.art4

Abstract

Synthesis of xanthone derivatives had been conducted to obtain new antimalaria active compounds. The characterization of the synthesized xanthones was also conducted. Synthesis of xanthone was conducted from the raw material of hydroxybenzoic acid and phenol derivatives using Eaton's reagent via acylation-dehydration reaction by modified Grover, Shah and Shah (GSS) method. The synthesis of 2,3,4-trihydroxy-5-methyl xanthone was carried out using gallic acid, o-cresol and Eaton's reagent.The mixture was heated for 3 h at 80 °C to yield 2,3,4-trihydroxy-5-methyl xanthone in 43% yield as dark red viscous liquid. The results of IR, 1H-NMR and 13C-NMR analysis of sampleshowed that the compound2,3,4-trihydroxy-5-methyl xanthonehas successfully synthesized.
Identification and Heme Polymerization Inhibition Activity (HPIA) Assay of Ethanolic Extract and Fraction of Temu Mangga (Curcuma mangga Val.) Rhizome Dhina Fitriastuti; Tatang Shabur Julianto; Annisa Wahyu Nur Iman
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 1, February 2020
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol1.iss1.art10

Abstract

Curcuma mangga Val. is one of Indonesian herbs from Zingiberaceae family that is under explored and could contain potentially active substances to serve as an antimalarial. This research intends not only to examine the antimalarial activity by means of heme polymerization inhibitor mechanism by using the ethanolic extract and fraction of Curcuma mangga Val. but also to identify its compound classification. The extract of temu manga was obtained by Soxhlet extraction method using ethanol solvent followed by fractionation using Vacuum Liquid Chromatography with solvent sequence n-hexane, n-hexane: ethyl acetate (2:1), ethyl acetate and ethanol. The extract and fraction were analyzed by using LC-MS and GC-MS. Activities of hem polymerization inhibition showed by IC50 values which were obtained from analysis of relationship between concentration sample and the percentage of inhibition using the PROBIT on statistical software. The result of HPIA assay shows that the IC50 value of ethanolic extract and ethanolic fraction of Curcuma mangga Val. rhizome are 2.273 and 1.479 mg/mL, respectively. It clearly shows that the heme polymerization inhibition activity of ethanolic fraction relatively better than that of ethanolic extract. Phytochemical screening determines the ethanolic extract contains saponin, terpenoid, and phenol while the ethanolic fraction contains terpenoid. Thus, terpenoid compound is presumed to be the inhibitor of heme polymerization. The results of analysis with LC-MS and GC-MS showed that the active compounds suspected to inhibit heme polymerization in ethanolic extract and fraction were (E) -labda-8 (17), 12-dien-15,16-dial and di-n-octyl phthalate, respectively. Keywords: antimalarial, Curcuma mangga Val., heme polymerization