5,7',9'-Trihydroxy-3-methoxyspiro[2,3-dihydronaphthalene-4,3'-2-oxatricyclo[6.3.1.04,12]dodeca-1(11),4(12),5,7,9-pentaene]-1-one 在
碘苯二乙酸 作用下,
以
2,2,2-三氟乙醇 为溶剂,
以50%的产率得到(1R,11S)-15-hydroxy-10-methoxy-2,20-dioxahexacyclo[9.8.1.11,12.13,7.011,22.016,21]docosa-3,5,7(22),12(21),13,15,18-heptaene-8,17-dione