Five New Stilbenes from the Stem Bark of Artocarpus communis

Five new prenylated stilbenes (1 – 5), along with the known compounds cudraflavone C, trans-4-isopentenyl-3,5,2′,4′-terahydroxystilbene, trans-4-(3-methyl-E-but-1-enyl)-3,5,2′,4′-tetrahydroxystilbene, pannokin G, cycloartobiloxanthone, artonin P, morusin, artocarpin, artonin E, kuwanon C, artobiloxanthone, and artoindonesianin C (6 – 17) were isolated from the stem bark of the tropical tree Artocarpus communis. The structures were established by NMR spectroscopic analysis, MS studies, and comparison with spectral data reported in the literature.