23758-16-9 5H-7,4-Methenofuro(3,2-c)oxireno(f)oxacycloundecin-5,9(7H)-dione, 3-(acetyloxy)-1a,2,3,7a,8,10a,11,11a-octahydro-11a-methyl-8-methylene-, (1aS-(1aR*,3R*,7S*,7aS*,10aR*,11aR*))- Scandenolide