Three new citrinin analogues, penicitols A-C (1-3), and one new xanthone derivative, penixanacid A (4), together with four known biogenetically related compounds (5-8), were discovered from the extract of a mangrove-derived fungus, Penicillium chrysogenum HND11-24. The structures of penicitols A-C and penixanacid A were established through analysis of extensive spectroscopic data. Their cytotoxic activity against HeLa, BEL-7402, HEK-293, HCT-116, and A549 cell lines was evaluated.