(2S,3R,4R,5R,6S)-2-(((2R,3R,4S,5S,6R)-5-Hydroxy-2-(((4R,5'R,6R,6aR,6bS,8aS,8bR,9S,10R,11aS,12aS,12bS)-4-hydroxy-5',6a,8a,9-tetramethyl-1,3,3',4,4',5,5',6,6a,6b,6',7,8,8a,8b,9,11a,12,12a,12b-icosahydrospiro[naphtho[2',1':4,5]indeno[2,1-b]furan-10,2'-pyran