(5R,8R,8aS)-(-)-5-cyano-5-<5-(trimethylsilyl)pent-4-yn-1-yl>-8-methylindolizidine

(5S,8R,8aS)-(-)-5-(4-pentynyl)-8-methylindolizidine

(5R,8R,8aS)-(-)-5-(7-hept-3-enyl)-8-methylindolizidine