17-Oxolupanine 4697-83-0 7,14-Methano-4H,6H-dipyrido(1,2-a:1',2'-e)(1,5)diazocine-4,13(14H)-dione, decahydro-, (7S-(7alpha,7abeta,14alpha,14aalpha))- Lupanine, 17-oxo-