154674-22-3 4-Decyl-3a,6a-dihydro-3-methylenefuro(3,4-b)furan-2,6(3H,4H)-dione Discosiolide Furo(3,4-b)furan-2,6(3H,4H)-dione, 4-decyldihydro-3-methylene-, (3aR-(3aalpha,4alpha,6aalpha))-