<正>In the presence of catalytic amount of In(OTf)_3(10 mol%),a series of aldimines reacted with tetraallyltin in a 2:1 molar ratio to afford the corresponding
<正>Two new oleanane-type saponins,crotalarioside A(1) and crotalarioside B(2),were isolated from the roots of Polygala crotalarioides.Their structures were elu