Two new diterpenoids from Isodon lungshengensis

Two new diterpenoids, lungshengenin B acid C (1-2), were isolated from Isodon lungshengensis. The structures were determined as 1 alpha-hydroxy-2 beta,3 beta,11 beta,15 beta-tetraacetoxy-ent-kaur-16-en-6-one; 11 alpha-hydroxy-2 beta,3 beta,6 alpha-triacetoxy-ent-kaur-16-en-15-one by 1D and 2D NMR techniques (COSY, HETCOR, COLOC).