Comparative phytochemical investigation of Salvia miltiorrhiza and Salvia triloba.

From the aerial parts of Chinese Salvia miltiorrhiza Bunge a novel sesquiterpene (1), which possesses a rare substitution pattern, together with seven known abietane type diterpenes has been isolated. Structure 1 was elucidated on the basis of spectral analysis, including 2D-NMR spectroscopy, especially long range 1H-13C correlation (COLOC). At the same time royleanone, 7alpha-acetoxyroyleanone, and sugiol were identified for the first time from the roots of Salvia triloba L. f.