Objective: The volatile compounds from Ainsliaea fragrans were studied. Method: Solid-phase micro-extraction(SPME) was used to extract the volatiles. The chemical constituents were analyzed by gas chromatography-mass spectrometry(GC-MS) coupled with Kovats indece. A quantitative analysis in percent was performed by peak area normalization measurements. Result: Fourteen compounds were identified

59.92% of total volatiles. Conclusion: The main compounds were 3-ethyl-8-methyl-S-triazolo pyrazine(43.37%)

caryophyllene(8.89%)

Z

Z

Z-1

5

9

9-tetramethyl-1

4

7-cycloundecatriene(2.47%).