Psorantin, a unique methylene linked dimer of vismin and kenganthranol E, two anthranoid derivatives from the fruits of Psorospermum aurantiacum (Hypericaceae)

Phytochemical investigations of the fruit of Psorospermum aurantiacum (Hypericaceae) led to the isolation of twelve compounds along which two new prenylated anthranoids named psorantin (1) and kenganthranol E (2). Psorantin which is a dimer of vismin formed through a methylene linkage and kenganthranol E were evaluated against four microbial strains Bacillus megaterium, Escherichia coli, Chlorella fusca and Microbotryum violaceum.