A new diterpene glycoside from Isodon forrestii

A new diterpene glycoside named 9(10-->20)-abeo-7 beta ,10 beta ,11,15-tetrahydroxy-8,11,13-abietatrien-12-O-beta -D-glucopyranoside was isolated from aerial parts of Isodon forrestii. Its structure was determined by means of spectroscopic studies.