Lichen is a unique symbiotic organism formed from the mutualism relationship between fungus and algae. The aims of this research are to isolate and to examine antifungal activity of secondary metabolite compound from lichen Teloschistes flavicans. This research was conducted by extracting lichen dried powder using acetone solvent for 3×24 hours. The extract was isolated by Column Chromatography (CC) and Thin Layer chromatography (TLC) with G60 silica gel as stationary phase. Then it was eluted by n-hexane and ethyl acetate solvents in a gradient elution. The isolate was obtained and purified by recrystallization process then determined by using UV-VIS, FTIR, LC-MS, and 1H-NMR. The isolated compound is an orange needle "3-[1'-(2",3"-dihydroxy-phenyl)-propyl]-7hydroxy-chroman-4-one" with the formula of C18H18O5. The antifungal activity test against Aspergillus flavus using disc diffusion method showed that the inhibitory zone was 11 mm in the concentration of 1000 mg mL-1 .
Lichen adalah organisme simbiosis unik yang terbentuk dari hubungan mutualisme antara alga dan jamur. Lichen sangat potensial untuk dikembangkan sebagai bahan obat modern, terutama di Indonesia yang belum banyak meneliti tentang lumut. Penelitian ini bertujuan untuk mengisolasi dan uji aktivitas antijamur senyawa metabolit sekunder dari lichen Teloschistes flavicans. Penelitian ini dilakukan dengan mengekstraksi serbuk kering lichen dengan menggunakan pelarut aseton selama 3×24 jam. Ekstrak aseton diisolasi dengan kromatografi kolom (KK) dan kromatografi lapis tipis (KLT) dengan fase diam silika gel G.60 yang dielusi dengan pelarut n-heksan dan etil asetat secara bertahap. Isolat kristalin dimurnikan dengan proses rekristalisasi. Senyawa murni ditentukan oleh strukturnya menggunakan UV-VIS, FTIR, LC-MS, dan 1H-NMR. Senyawa yang diisolasi diperoleh jarum oranye "3-[1'- (2", 3"-dihydroxy-phenyl)-propyl]-7hydroxy-chroman-4-one" dengan rumus C18H18O5. Uji aktivitas antijamur terhadap Aspergillus flavus menggunakan metode difusi cakram menunjukkan bahwa zona hambat adalah 11 mm pada konsentrasi 1000 mg/mL.
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