Xinshengin, the First Altenusin with Tetracyclic Skeleton Core from Phialophora spp.

Xinshengin (I), the first tetracyclic altenusin with an unprecedented altenuene/tetrahydrofuran-fused skeleton core, is obtained from cultures of the endolichenic fungal strain Phialophora spp., along with the new natural compound phialophoriol (II) and a known altenusin.