Isoprenylated Flavonoids and Adipogenesis-Promoting Constituents from Morus nigra

Ten new isoprenylated flavonoids, nigrasins A−J (1−10), and three known compounds were isolated from the twigs of Morus nigra. Compounds 8 and 9 promoted adipogenesis, characterized by increased lipid droplet and triglyceride content in 3T3L1 cells, and induced up-regulation of the expression of adipocyte-specific genes, aP2 and GLUT4.