5532-23-0;Senecionan-11,16-dione, 13,19-didehydro-15,20-epoxy-15,20-dihydro-12-hydroxy-, (15alpha,20S)-;Spiro((1,6)dioxacyclododecino(2,3,4-gh)pyrrolizine-3(2H),2'-oxirane)-2,7(4H)-dione, 5,6,9,11,13,14,14a,14b-octahydro-6-hydroxy-3',6-dimethyl-5-methylene-, (3S,3'S,6R,14aR,14bR)-