Stereoselective synthesis of (.+-.)-1-0-methylloganin, 10-hydroxyloganin, secologanin, and sweroside aglucons from a common 1-hydroxy-4a,5,8,8a-tetrahydroisochromene synthon
Stereoselective synthesis of (.+-.)-1-0-methylloganin, 10-hydroxyloganin, secologanin, and sweroside aglucons from a common 1-hydroxy-4a,5,8,8a-tetrahydroisochromene synthon