Chemical constituents in the roots of Salvia przewalskii Maxim.

AimTo investigate the chemical composition of the root of Salvia przewalskii Maxim. MethodsCompounds were isolated by silica gel column chromatography. Structures of these compounds were elucidated by spectral analysis (EI-MS, FAB-MS, ¹HNMR, ¹³CNMR, ¹H-¹H COSY, ¹H-¹³C COSY, HMBC, NOESY) and phytochemical properties. ResultsEight compounds were isolated and identified as: tanshinone II-A (I), crypotanshinone (II), przewaquinone A (III), sugiol (IV), ursolic acid (V), 2α,3α-dihydroxy urs-12-ene-28-acid (VI), oleanolic acid (VII), and neo-przewaquinone A (VIII). ConclusionCompound VIII is a new compound, and compound II, IV, V, VI and VII are isolated from this plant for the first time.