Labdane diterpenoids from Leonurus sibiricus.

ABSTRACT: Six new labdane diterpenoids, preleosibirone A (1), 13-epi-preleosibirone A (2), isopreleosibirone A (3), leosibirone A (4), leosibirone B (5), and 15-epi-leosibirone B (6), were isolated from the leaves of Leonurus sibiricus. The absolute configurations of 1, 2, 5, and 6 were established by X-ray crystallographic analyses, and leosibirone A (4) was shown to be an artifact of the isolation process.

SUBMITTER: Wu H 

PROVIDER: S-EPMC3081930 | biostudies-literature | 2011 Apr

REPOSITORIES: biostudies-literature