Abstract: | Identification and synthesis of new depsides isolated from oakmoss (Evernia Prunastri (L .) ACH .) Lecanoric acid 5 and 4 new depsides have been isolated from oakmoss (Evernia Prunastri (L .) ACH .) extracts by means of silicagel column chromatography. Various spectral methods including 13C-NMR. were used in determining the structure of 4,2″-O-methylgyrophoric acid ( 1 ), lecanoric acid ( 5 ), 2′-O-methylevernic acid ( 2 ), 3′-methylevernic acid ( 3 ) and methyl 3′-methyllecanorate ( 4 ). |