Components of Broussonetia kazinoki Sieb. 2 Structures of four new isoprenylated 1,3-diphenylpropane derivatives, kazinols J, L, M, and N.

A new isoprenylated 1, 3-diphenylpropane derivative, kazinol L, was isolated from the extract of the root bark of Broussonetia kazinoki SIEB. (Japanese name, "Himekozo, " Moraceae), and three new isoprenylated 1, 3-diphenylpropane derivatives, kazinols J, M, and N were isolated from the cortex. The structures of kazinols J, L, M, and N were shown t be 1, 2, 3, and 4, respectively, on the basis of spectral data.