First occurrence of a xanthone and isolation of a 6-ketodehydrorotenoid from Dalbergia sissoides

Isoflavonoids and related compounds

“…98 From the stem-bark of Dalbergia sissoides, a new rotenoid 130 was isolated. 99 This compound has not been previously reported as a natural product, although it has been obtained as an oxidation product of dehydroamorphigenin. 100 A new rotenone derivative 131 was obtained from the roots of Derris oblonga, together with several known isoflavonoids including isoflavones, coumestans, pterocarpans and coumaronochromones.…”

New Xanthone from Millettia pachyloba Drake

“…Compounds 1 and 2 have not been previously isolated from any species of Millettia, while 2 has ever been reported to occur in Polygala nyikensis (Polygalaceae) [11]. Only a few xanthones and anthraquinones have been obtained from several other species of Leguminosae, such as Caesalpinia sappan [18], Cassia fistula [19], Cassia sieberiana [20] Cyclopia subternata [21], Dalbergia sissoides [22], Hedysarum denticulatum [23]. In conclusion, flavonoids are important chemical characteristics of the Millettia species.…”