Three New Sesquiterpenoids from Agrocybe sp

Two new marasmone derivatives,1α,2β-dihydroxymarasmone（1） and 2β,3α-dihydroxymarasmone（2）,and one new norsesquiterpenoid,14-hydroxyoreadone（3）,were obtained from the fermentation broth of Agrocybe sp.,together with three known sesquiterpenes,agrocybolacton（4）,marasmene（5） and 14-hydroxymarasmene（6）.Their structures were elucidated by spectroscopic analyses,including 1D-and 2D-NMR experiments,high resolution electron spray ionization quadrupole time of flight（HR-ESI-Q-TOF） mass spectrometry,chemical correlation,X-ray single crystal diffraction and also compared with reported data.