Herquline A is an alkaloid fungal metabolite originally isolated from P. herquei. It inhibits cell death induced by influenza A strain A/PR/8/34 in MDCK cells with an IC50 value of 10 μg/ml and inhibits viral replication in a plaque assay in a concentration-dependent manner. Herquline A also inhibits platelet aggregation induced by ADP and platelet-activating factor (PAF) in vitro (IC50s = 180 and 240 μM, respectively).
