Study of the chemical constituents of Pruni Cortex and its related parts.

The water extract of Pruni Cortex, which is obtained from the bark of Prunus jamasakura, is a major component in Brocin. We investigated the constituents of the water and methanolic extracts of Pruni Cortex. From the water extractive, two flavonoids (sakuranin and neosakuranin; major constituents of this extractive), four known lignans, and six aromatic compounds including one new compound were obtained. In addition, we also investigated the constituents of the flowers and the leaves of Prunus yedoensis.