Objective: To investigate into lignans of active components of Saururus chinensis anti-nicotine withdrawal symptoms.Method: Various column chromatography were used in the isolation and purification

and physiochemical constant determination and spectral analysis were adopted to determine the chemical structures of lignans.Result: Thirteen chemical compounds were isolated from the active of anti-withdrawal symptoms

sauchinone (1)

sauchinone A (2)

1'-epi-sauchinone (3)

licarin B (4)

licarin A (5)

5-methoxy-licarin A (6)

saucernetin (7)

5

5'-dimethoxy-saucernetin (8)

nectandrin B (9)

5

5'-dimethoxy-nectandrin B(10)

3'

4'-methylenedioxy-3

4

5

5'-tetramethoxy-7

7'-epoxylignan(11)

3'

4'-methylenedioxy-3

4

5-trimethoxy-7

7'-epoxylignan (12)

machilin D (13). Conclusion: Compounds 6

8

10-12 were first isolated from this plant.