Six crystalline components were isolated from the lipophilic fraction of Artemisia annua L. They have been identified as four sesquiterpenes, one flavonol and one coum-grin.qinghaosu I and III are new sesquiterpenes. Five main constituents, camphene, iso-artemisia ketone, I-camphor, β-carophyllene and β-pinene were identified from the volatile oil of this herb.