1H-Naphtho(1,8a-c)furan-3(5H)-one, 5-(acetyloxy)-7-(2-(2,5-dihydro-5-oxo-3-furanyl)ethyl)-6,6a,7,8,9,10-hexahydro-7,8-dimethyl-, (5S-(5alpha,6aalpha,7alpha,8beta,10aR*))- 75478-99-8