(3aS,4S,9R,9aR)-4-[(4-氟苯基)氨基]-9-(4-羟基-3,5-二甲氧基苯基)-6,7-二甲氧基-3a,4,9,9a-四氢-3H-萘并[3,2-c]呋喃-1-酮