Author's Organization:Faculty of Pharmaceutical Sciences, Hokkaido University Faculty of Pharmaceutical Sciences, Hokkaido University Faculty of Pharmaceutical Sciences, Hokkaido University
Convallagenin-B (III) from the flowers of Convallaria keisukei MIQ., Japanese lily of the valey, has been elucidated as 25L, 5β-spirostan-1β, 3β, 4β, 5β-tetrol, that represents the first instance of the 25L-tetrahydroxy steroidsapogenin.