Three New Diterpenoids from <i>Salvia przewalskii</i><scp>Maxim</scp>

Abstract

Abstract magnified image Three new compounds including one ortho ‐quinone‐type icetexane diterpenoid, i.e. , przewalskin E ( 1 ), one abietane dinorditerpenoid, i.e. , przewalskin F ( 2 ), and one 7,20‐epoxyabietane diterpenoid, i.e. , przewalskin G ( 3 ), were isolated from Salvia przewalskii Maxim . The identification and structure elucidation of these compounds were based on 1D‐ and 2D‐NMR spectral‐data analysis. It is noteworthy that przewalskin E ( 1 ), featured with an 11,12‐dioxoicetexane skeleton, represents the second example of a naturally occurring ortho ‐quinone‐type icetexane diterpenoid from Salvia plants.