Four previously undescribed compounds, including (Z)-chloromonilinic acid B (1), (E)-chloromonilinic acid C (2), 4-chlorocurvularin (5), and 4-chlorocurvularinic acid (6), together with four known compounds, (E)-chloromonilinic acids A and B, pinselin, and anhydromevalonolactone, were isolated from the fungus Curvularia sp. BCC52426. The chemical structures were determined by comparing their NMR spectra to documented spectra of the related compounds and the isolated compounds were also appraised for antimicrobial activity and cytotoxicity.