Viridiol

Viridiol is a furanosteroidal secondary metabolite produced by viridin-producing fungi such as Gliocladium virens (Trichoderma virens). It arises via enzymatic reduction of the antifungal compound viridin and can also be generated through environmental microbial bioconversion. Viridiol has been identified as a potent inhibitor of phosphatidylinositol 3-kinase (PI3K), a key regulator of cellular growth and survival signaling pathways. Production studies demonstrated scalable preparation from T. virens cultures, and synthetic work established enantioselective access to viridiol and related furanosteroids. Due to its phytotoxic properties and PI3K inhibitory activity, viridiol serves as both a bioactive natural product probe and a tool compound for studying PI3K-associated signaling.