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To study the chemical constituents from the leaf of Rhododendron przewalskii.Isolate and purify compounds by chromatographic methods, and identify structures by spectroscopic methods.Six compounds were isolated and identified as hyperin (1), avicularin (2), gossypetin-3-O-β-D-galactoside (3), quercetin (4), betuloside (5) and β-sitosterol (6).Compounds 1-4 and 6 are isolated from Rhododendron przewalskii for the frist time.

To study the alkaloid component of Corydalis adunca Maxim.The constituents were isolated by chromatographic methods, their structures were elucidated by spectroscopic evidences.Three compounds were purified and their structures were identified, they were identified as dorydaline (I), dehydrocorydaline (II), dihydrosanguinarine (III).Compounds I , II are isolated from this plant for the first time.