Abietane and rearranged abietane diterpenes from Salvia montbretii

From the roots of Salvia montbretii six new diterpenoids were isolated in addition to eleven known compounds. The new compounds were established as salvibretol (1), 1-oxosalvibretol (4), 6-hydroxysalvinolone (5), 7-hydroxytaxodione (6), 7,7'-bistaxodione (7), and 11,11'-didehydroxy-7,7'-dihydroxytaxodione (8), using 1D and 2D NMR techniques.