Two New Diterpenoids fromCallicarpa pedunculata

Two new diterpenoids, pedunculatic acid A (=(4R,5 alpha,7 alpha)-7-ethoxy-9 beta,13 beta-dioxyabiet-8(14)-en-18-oic acid: 1) and pedunculatic acid B (=(4S,5 alpha,12 beta)-8 beta,14 beta-epoxy-12-hydroxy-11-oxototaran-19-oic acid: 2). together with three known sesquiterpenoids, were isolated from the Chinese medicinal herb Callicarpa pedunculata R. BROWN. Their structures were elucidated by spectroscopic analyses, including 1 D-and 2D-NMR, and by high-resolution mass spectrometry.