NEW ABIETANE DITERPENE ALKALOIDS POSSESSING AN OXAZOLE RING FROM SALVIA TRIJUGA

摘要

Two new diterpene alkaloids,isosalviamine-A(1)and B(2)and nine known tanshinones(3-11)were isolated from the MeOH extract of roots of S.trijuga.The structures of these new compounds were elucidated from ~1H and ~(13)C NMR spectra with the aid of COSY,NOESY,HMQC and HMBC experiments.