Author's Organization：Institute for Chemical Research, Kyoto University Institute for Chemical Research, Kyoto University Institute for Chemical Research, Kyoto University
On the basis of chemical and spectroscopic evidence, the structure and absolute configuration of lasiokaurinol isolated from Isodon lasiocarpus (HAYATA) KUDO were established as ent-1β-acetoxy-7β, 20-epoxy-16-kaurene-6α, 7α, 14α, 15α-tetraol (9). The structure of another minor diterpenoid, lasiokaurinin, was proposed as 10 on the basis of spectroscopic evidence. Some chemical reactions confirmed its structure and relative stereochemistry as 10.
