Objective: To study the volatiles fromE. humifusa Method: The volatile compounds from Euphorbia humifusa were extracted by head-space solid-phase micro-extraction (HS-SPME) coupled with gas chromatography-mass spectrometry (GC-MS). A quantitative analysis in percentage was performed by peak area normalization measurements. Result: Twenty-two compounds were identified

presenting for 93.89% of total volatiles. The volatile constituents were mainly ketones (32.33%)

acids (25.32%)

esters (14.55%)

and other substances. Conclusion: The main compounds were N-hexadecanoic acid (20.35%)

phytol (16.41%)

2-methoxy-4-vinylphenol (10.98%) and so on. The main fragrance constituents were dihydroactindiolide and copaene.