Bouea oppositifolia also called Marian plum belongs to the family Anacardiaceae, is an edible fruit tree and well-known in Binh Minh district, Vinh Long province, Vietnam. Fresh Marian plum can be used like other fruits, and it is also used in traditional medicine to treat digestive diseases, and constipation. From the methanol extract of B. oppositifolia leaves, seven compounds were isolated including taraxerol (1), taraxerone (2), friedelin (3), 3,4-secofridelan-3-oic acid (4), gallic acid (5), methyl gallate (6), and naringenin (7). The structure of these compounds was elucidated by ESI-MS, NMR spectroscopic methods, and by comparison with the published data. Compound 1-6 are recorded for the first time from this species.