Objective: To study the chemical constituents of the leave of Paulownia tomentosa.
Methods: The constituents were isolated by column chromatography and their structures were elucidated through spectroscopic analysis.
Results: The compounds were identified as apigenin(I), uteolin(II), homoeriodictyol(III), 3alpha-hydroxyurs-12-en-28-oic acid (IV),3beta,19alpha-dihydroxyurs-12en-28-oic acid (pomolic acid)(V),2alpha,3a-dihydroxyurs-12-en-28-oic acid(VI),ursolic acid (VII),2alpha,3beta-dihydroxyolean-12-en-28-oic acid (maslinic acid) (VIII), daucosterol(IX),beta-sitosterol(X).
Conclusion: The compound I-X are obtained from the leave of Paulownia tomentosa (Thunb.) Steud for the first time.