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Putra, Deddi P.
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Biochemistry, Genetics & Molecular Biology Health Professions Immunology & microbiology Medicine & Pharmacology Public Health

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ISOLASI SENYAWA ANTIOKSIDAN DARI KELOPAK BUNGA NUSA INDAH (Mussaeda frondosa L.) Putra, Deddi P.; Fatra, H. Al; Bakhtiar, A.
Jurnal Farmasi Indonesia Vol 5, No 1 (2010)
Publisher : Jurnal Farmasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35617/jfi.v5i1.37

Abstract

An antioxidant flavonol glycoside isoquercitrin (0.01% w/w) from white petals of Mussaenda frondosa L flowers has been isolated in form of amorf yelowish powder, m.p. 288-230 oC. The structure was established from data of chromatography, UV-Vis spectra with shift reagents, infrared as well as the analysis of spectral data of  1H and 13C NMR. Antioxidant activity was performed by inhibition of radical scavenger of 2,2-difenil-1-pikrilhidrazil (DPPH) 50mM and the compound showed a high persentage inhibition of 93.97% compared to quersetin (92.92%). The compound was first reported from white petal of Mussaenda frondosa L.   ABSTRAK Antioksidan isokuersitrin (0,01% b/b) telah diisolasi dari kelopak putih bunga Nusaindah (Mussaenda frondosa L.), berupa amorf berwarna kuning dengan jarak leleh 228-230°C. Struktur senyawa ini ditetapkan berdasarkan (pola) kromatografi, spektrofotometer ultraviolet dengan berbagai pereaksi geser, spektrum inframerah serta analisis spektrum RMI (1H dan 13C). Pemeriksaan aktivitas antioksidan dilakukan dengan metode DPPH (radikal 2,2-difenil-1-pikrilhidrazil) 50mM dan senyawa (1) memiliki persentase inhibisi sebesar 93,97% sebanding dengan kuersetin (92,29%). Senyawa ini baru pertama dilaporkan dari kelopak putih bunga Mussaenda frondosa L
Lichen substances from Teloschistes flavicans (Sw.) Norman: Isolation, crystal structure, and evaluation of their antibacterial activities Ismed, Friardi; Arifa, Nurwahidatul; Nissa, Mentari Q.; Putra, Deddi P.; Orue, Analia IC.; Clegg, Jack K.; Rouaud, Isabelle; Dévéhat, Françoise L.
Narra J Vol. 5 No. 2 (2025): August 2025
Publisher : Narra Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52225/narra.v5i2.1463

Abstract

Teloschistes flavicans (Sw.) Norman is a lichen known as the golden-haired lichen. This lichen has been recognized and used in herbal medicine mixtures as an antimicrobial and bioindicator of air pollution that plays a role in ecological systems. The aim of this study was to explore the potential of its secondary metabolites as antibacterial and anticancer agents, particularly against bacterial pneumonia. Two main compounds (vicacinin and parietin) were isolated with chromatography and identified by spectrometry and single-crystal X-ray diffraction. The crystallographic data of vicanicin are reported for the first time. Chromatography and recrystallization methods were used to obtain both compounds with orange (parietin) and white (vicanicin) crystals. Furthermore, these compounds were evaluated for cytotoxicity on keratinocytes (HaCaT) cells and antibacterial activity against pneumonia pathogens (Klebsiella pneumoniae ATCC 1706, Streptococcus pneumoniae ATCC 49619, Moraxella catarhalis ATCC 25240, and Staphylococcus pyogenes ATCC 19615). The cytotoxic activity of these compounds was moderate at the concentration of 50-100 µM. The antibacterial pneumonia activity was relatively weak compared to chloramphenicol. Between the two compounds, vicanicin showed stronger activity than parietin against all strains. Vicanicin was more active against Klebsiella pneumoniae and Staphylococcus pyogenes with minimum inhibitory concentrations of 156±0.77 µM and 156±0.91 µM, respectively. In this study, comprehensive molecular structures of parietin and vicanicin have been successfully elucidated, and their antibacterial and cytotoxic activities have been provided.
Co-Authors Arifa, Nurwahidatul Bakhtiar, A. Clegg, Jack K. Dévéhat, Françoise L. Fatra, H. Al Friardi Ismed Nissa, Mentari Q. Orue, Analia IC. Rouaud, Isabelle