(2aR,2'R,4S,5'S,6aS,6bS,8aS,8bR,9S,11aS,12aS,12bR)-5',6a,8a,9-四甲基二十二氢螺[萘并[2',1':4,5]茚并[2,1-b]呋喃-10,2'-吡喃]-4-醇,98+%