[Chemical constituents from seeds of Ziziphus mauritiana].

Objective: To study the chemical constituents in the seeds of Ziziphus mauritiana.
Methods: The constituents were isolated by silica column chromatography and their structures were elucidated by physico-chemical properties and spectroscopic analysis.
Results: Twelve compounds were isolated from the seeds of Ziziphus mauritiana and identified as betulinic aldehyde (1), betulinic acid (2), ceanothic acid (3), frangufoline (4), spinosin (5), beta-sitosterol (6), daucosterol (7), daucosterol-6'-octadecanoate (8), sucrose (9), docosanoic acid (10), stearic acid (11), palmitoleic acid (12).
Conclusion: All the compounds are obtained from Ziziphus mauritiana seeds for the first time and compounds 4,5 and 8 are isolated from this plant for the first time.