Objective: To explore the chemical constituents of the Cassia mimosoides. Method: Silica gel chromatography

gel chromatography

and reverse phase column chromatography were used for separation and purification. The structures were identified on the basis of spectral data and physicochemical examination. Result: Twelve compounds were isolated from C. mimosoides and their structures were identified as vanillic acid(1)

luteolin-7-O-β-D-glucoside(2)

luteolin(3)

chrysophanol-gentiobioside(4)

5

7

4'-trihydroxy-3'-methoxyflavone(5)

quercetin(6)

kaempferol(7)

oleanolic acid(8)

emodin(9)

physcion(10)

daucosterol(11)

β-sitosterol(12). Conclusion: Compounds 5 was isolated from in Cassia for the first time and compounds 1

4

6

7 were isolated from C. mimosoies for the first time.