Abstract:Nine compounds, such as tetracosanoic acid (1), 7,8-dimethylalloxazine (2), (2S,3S,4R,10E)-2-[(2′R)-2′-hydroxylignoceroylamino]-10-octadecene-1,3,4-triol (3), uracil (4), butanedioic acid (5), adenosine (6), mannitol (7), β-sitosterol (8), and β-daucosterol (9), were isolated from the pulps of Dimocarpus longan Lour. The compounds 1~3, 5 and 7 were reported from D. longan for the first time.