Three New diterpenoids from Isodon Gesneroides

摘要

Three new diterpenoids, gesneroidins D-F (1-3), were isolated from Isodon gesneroides.The structure was determined as 3β, 7β, 11β, 15β-tetraacetoxy-ent-kaur-16-en-6-one;15β-hydroxy-1α, 3β, 6α, 7β, 11β-pentaacetoxy-ent-kaur-16-ene, 6α, 11β-dihydroxy-3β, 7β-diacetoxy-ent-kaur-16-en-15-one based on 1D and 2D NMR techniques(COSY, NOESY, HXTCOR,COLOC).