Return to Article Details 2-SUBSTITUTED 3-NITRO-2<i>H</i>-CHROMENES IN REACTION WITH AZOMETHINE YLIDE DERIVED FROM NINHYDRIN AND PROLINE: REGIO- AND STEREOSELECTIVE SYNTHESIS OF SPIRO[CHROMENO¬[3,4-<i>a</i>]PYRROLIZIDINE-11,2'-INDE¬NE]-1',3'-DIONES Download Download PDF