The ¢ä values of the MTPA derivatives
determined the absolute configuration of C-5¢¢ to be S,
indicating 9 to be the 5¢¢-epimer of triol 6. This was
confirmed when triol 6 derived from jasminin (7) was
subjected to a Mitsunobu reaction8 to provide acetate 13,
which differed from acetate 14 but proved identical to the
acetate of 9. Thus, 1 has the structure shown and is named
jasnudifloside A.