A new pyrrole alkaloid from the mycelium of Inonotus obliquus

Inotopyrrole B, a new pyrrole alkaloid, was isolated from the mycelium of Inonotus obliquus together with two known ones, inotopyrrole and 5-(hydroxymethyl)-1 H-pyrrole-2-carboxaldehyde. The structure of the new compound was established via detailed analyses of the spectroscopic data, in particular, 1D and 2D NMR and HRESIMS.