(4S,4aR,4bR,5aR,6aS,7S,9aS,9bR,10S,11R)-10,11-dihydroxy-4-(methoxymethyl)-4a,6a-dimethyl-2-oxo-4,4a,5a,6,6a,7,8,9,9a,9b,10,11-dodecahydro-2H-oxireno[2',3':5,6]indeno[4,5-h]isochromen-7-yl benzoate