A New Sesquiterpene from an Endophytic Aspergillus versicolor Strain

A new sesquiterpene, albican-11,14-diol (1), and seven known compounds, including sterigmatocystin (2), 3-hydroxy-5-(hydroxymethyl)-4-(4'-hydroxyphenoxy) pyrrolidin-2-one (3), (1H-indol-3-yl) oxoacetamide (4), indole-3-carboxylic acid (5), indole-3-acetic acid (6), indole-3-carboxaldehyde (7), and volemolide (8), were isolated from the cultures of Aspergillus versicolor, an endophytic fungus isolated from the marine green alga Codium fragile. The structure of 1 was elucidated by 1D, 2D NMR and mass spectroscopic techniques. The bioassay results showed that 1 possessed potent activity against brine shrimp, Escherichia colt, and Staphyloccocus aureus.