螺[10H-8,10a-环氧-2H-呋喃并[3',2':5,6]环庚三烯并[1,2-c]噁庚-3(3aH),10'-[5H-2,4a]乙基桥[2H]噁丙烯并[3a,4]薁并[6,5-b]呋喃]-2,8'(9'H)-二酮,4,6,6',6'a,7,8,9'a,9'b,11,11a-十氢-2',5',8,9'-四甲基-,(1'aS,2'R,3S,3aR,4'aR,5'S,6'aR,8R,9'R,9'aR,9'bR,
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