Objective: To study the chemical constituents from stems and leaves of Scutellaria baicalensis. Method: Eleven compounds were isolated from the dried stems and leaves of S. baicalensis. Their structures were identified on the basis of physic-chemical constants and spectral analysis. Result: Compounds were isolated and identified as chrysin (1)

5

7

4'-trihydroxy-6-methoxyflavone (2)

wogonin (3)

5

4'-dihydroxy-6

7

3'

5'-tetramethoxyflavone (4)

apigenin (5)

isoscutellarein (6) baicalein-7-O-β-D-glucopyranoside (7)

baicalin (8)

apigenin-7-O-β-D-glucopyranoside (9)

chrysin-7-O-β-D-glucuronopyranoside (10) and oroxylin-7-O-β-D-glucopyranoside (11). Conclusion: Compound 2

4 and 6 were firstly isolated from this plant. Compound 9 and 11 obtained from stems and leaves of S. baicalensis for the first time.