OBJECTIVE To study the secondary metabolites of endophytic fungus Aspergillus TQ67 isolated from Suaeda glauca. METHODS The compounds were isolated and purified by ODS reversed-phase column, preparative HPLC and HPLC techniques.And their structures were identified by the physicochemical properties and spectral analysis. RESULTS The compounds were identified as aspermutarubrol (1), sydowiols D (2), sydowiol E (3), L-tenuazonic acid (4), (E)-5-(hydroxymethyl)-2-(6′-methylhept-2′-en-2′-yl)phenol (5), sydonol (6), (7S)-(+)-7-O-methylsydonol (7), and hydroxysydonic acid (8). Compounds 2/3 and compound 1 were different from other compounds with IC50 values of (9.79±0.33) and (32.30±1.02) μg·mL-1 by DPPH assay and (230.55±2.50) and (278.99±8.32) μg·mL-1 by FRAP assay, respectively. CONCLUSION Compounds 2/3 and compound 1 isolated from endophytic fungus Aspergillus TQ67 isolated from Suaeda glauca show strong antioxidant activity.
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