Objective: To analyze the component correlation of oleanolic acid and ursolic acid between Diospyros kaki and its eleven kinds of Taxilli Herba. Method: Oleanolic acid and ursolic acid were extracted with ethanol by ultrasound for 30 minutes

and determined by RP-HPLC. Agilent Eclipse XDB C18column (4.6 mm×250 mm

5 μm) was used for the separation

with a flow rate of 1.0 mL · min-1 and column temperature of 25 ℃. The mobile phase were methanol-acetonitrile-0.05% solution of ammonium acetate (12:67:21) and detection wavelength was 210 nm. Result: There were good linearity in the range of 2.34-375 mg · L-1(r=0.999 9) and 5.21-834 mg · L-1(r=0.999 9) for oleanolic acid and ursolic acid

respectively. The average recovery rates were 99.57% and 99.72% for oleanolic acid and ursolic acid

respectively. In D. kaki

the content of oleanolic acid was 0.382 6-0.541 1 mg · g-1(branches) and 1.773 6-4.274 6 mg ·g-1 (leaves)

and ursolic acid was 0.649 0-1.625 8 mg · g-1 (branches) and 6.023 7-9.398 0 mg · g-1(leaves). Ursolic acid was not detected in the eleven kinds of Taxilli Herba

and oleanolic acid was found only in Viscum ovalifolium and V. diospyrosicolum. The contents of oleanolic acid were 1.221 4 mg · g-1(in branches of V. ovalifolium)

10.815 8 mg · g-1 (in leaves of V. ovalifolium)

and 7.158 4 mg · g-1 (in V. diospyrosicolum)

respectively. Conclusion: The oleanolic acid and ursolic acid were accumulated in the branches and leaves of D. kaki. Oleanolic acid was accumulated in V. ovalifolium and V. diospyrosicolum

but ursolic acid was not accumulated. The oleanolic acid and ursolic acid were not accumulated in Macrosolen cochinchinensis

M. tricolor

Helixanthera parasitica

H. Sampsoni

D. pentandra

S. parasitica

S. parasitica var. graciliflora

Taxillus chinensis and T. maclurei.