3,9,9a-Trimethyl-3a,4,5,7,8,9,9a,9b-octahydro-3H-naphtho[1,2-b]furan-2-one 5-Epidilatanolide A InChI=1/C15H22O2/c1-9-5-4-6-11-7-8-12-10(2)14(16)17-13(12)15(9,11)3/h6,9-10,12-13H,4-5,7-8H2,1-3H3/t9-,10+,12+,13-,15+/m0/s naphtho[1,2-b]furan-2(3H)-one, 3a,4,5,7,8,9,9a,9b-octahydro-3,9,9a-trimethyl-, (3aR,9S,9aR,9bS)- rel-(3R,3aR,9S,9aR,9bS)-3,9,9a-trimethyl-3a,4,5,7,8,9,9a,9b-octahydronaphtho[1,2-b]furan-2(3H)-one