(3aR,8aalpha,10aalpha)-3a,4a,5,8,8a,9,10,10alpha-八氢-4abeta,9alpha-二甲基-3-亚甲基呋喃并[2',3':5,6]环庚并[1,2-c]吡喃-2,7(3H,4H)-二酮
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