Studies On Chemical Constituents Of The Extractives By Petroleum From The Leaves Of Paulownia Fortunei (Seem.)Hemsl

Paulownia. fortunei (Seem.) Hemsl. is a ornamental plant, widely distributed in many parts of China. Its leaves, flowers,barks, roots, woods have been used as traditional herb medicine for treatment of some diseases. There is no previous work on the chemical constituents of its leaves. In this thesis we report the systematic studies on the leaves of P. fortunei, which were collected from Lanzhou city. 13 compounds were isolated from the petroleum extract of its leaves by means of column chromatography and recrystalization etc. Their structures were elucidated as steroids, flavonoids, organic acid esters and their glycosides etc. On the basis of spectroscopic methods along with comparision to authentic sample and literature. Then 10 chemical constituents were established as(1)diplacone,(2)3'-O-Methyldiplacone,(3)mimulone,(4)apigenin,(5)luteoli n,(6)ursolicacid,(7)β-sitosterol,(8)daucosterol,(9)1-acetoxy-3-hydroxyprop an-2-yl 3-hydroxyoctadecanoate,(10)hexadecanoic acid. All compounds were isolated from the leaves of P.fortunei. for the first time.The result of this paper will provide chemical theoretical evidences for exploiting and utilizing plant resources and for studies of plant pharmacological research.