Promoted by active indium produced in situ by Sm/InCl3·4H2O system,arylidenecyano-acetates undergo reductive cyclodimerization to afford cyclopentamine der
Two new iridoid glucosides 1 and 2, 10-O-(3, 4-dimethoxy-(E)-cinnamoyl)catalpol and 10-O-(3, 4-dimethoxy-(Z)-cinnamoyl)catalpol, were isolated from Lagotis yunn