3,6,9-tris(methylene)-2-oxododecahydroazuleno[4,5-b]furan-4-yl acetate InChI=1/C17H20O4/c1-8-5-6-12-9(2)7-13(20-11(4)18)15-10(3)17(19)21-16(15)14(8)12/h12-16H,1-3,5-7H2,4H azuleno[4,5-b]furan-2(3H)-one, 4-(acetyloxy)decahydro-3,6,9-tris(methylene)-