2H-Naphtho(1,8-bc)furan-2,8(2aH)-dione, 3,4,5,5a,8a,8b-hexahydro-2a,5a,7-trimethyl-6-(2-(tetrahydro-3-hydroxy-5-oxo-3-furanyl)ethyl)-, (2aS-(2aalpha,5abeta,8aalpha,8balpha))-(partial)- 71135-32-5