Isolation and Identification of Labdane Diterpenoids in Hedychium villosum Wall
The rhizome of Hedychium villosum were extracted repeatedly with methanol.The extract was partitioned be-tween EtOAC and H2O.Five labdane diterpenoids were isolated from the ethyl acetate extract by a variety of separation methods(Silica gel,Sephadex LH-20 column chromatography and HPLC).By means of spectroscopic analysis,the com-pounds were identified as hedychenone(1),yunnancoronarin D(2),coronarin A(3),yunnancoronarin A(4)and yunnancoro-narin E(5).All compounds were isolated from H.villosum for the first time.
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