Abstract:In order to understand the chemical constituents of Bombax ceiba,seventeen compounds were isolated from its roots.On the basis of physicochemical properties and spectral data,they were identified as 9,19-cyclolanost-24-en-3-one (1),cycloartenol (2),friedelin (3),lupenol (4),3β-acetoxy oleanolic acid (5),oleanolic acid (6),ergosta-4,6,8(14),22E-tetraene-3-one (7),cholest-4-en-3-one (8),5α,8α-epidioxy-ergosta-6,9,22E-dien-3β-ol (9),β-sitosterol (10),6β-hydroxy-stigmast-4-en-3-one (11),cholesterol (12),β-sitosterol-3-O-β-D-glucoside-6’-O-eicosanate (13),trilinolein (14),1-hentriacontanol (15),docosanoic acid (16),lauryl oleate (17).Except compounds 4,6,9,and 10,the others were isolated from the genus Bombax for the first time.