(4aR,6aS)-2,3,4,4aα,5,6,11aα,11b-Octahydro-8-hydroxymethyl-4,4,11bβ-trimethyl-1H-oxireno[1,10a]phenanthro[3,2-b]furan-9(7aβH)-one [ 65388-16-1 ]