As a part of our ongoing
program toward the discovery of novel bioactive constituents from
the genus Millettia, we have isolated two new rotenoids, namely
millettiaosas A, B (1, 2) (Fig. 1) togetherwith four known compounds
(3–6) fromthe rootsofM. speciosa.Herein,wereport the isolationand
structural elucidation of the two new compounds (1, 2), as well as
their cytotoxic activity.