7,14-dihydro-7,14-epoxy-7-ethoxy-14-(trimethylsilyl)dibenzanthracene 、 (12-ethoxy-23-oxahexacyclo[10.10.1.02,11.03,8.013,22.014,19]tricosa-2(11),3,5,7,9,13(22),14,16,18,20-decaen-1-yl)-trimethylsilane 、
四丁基氟化铵 生成 12-ethoxy-23-oxahexacyclo[10.10.1.02,11.03,8.013,22.016,21]tricosa-2(11),3,5,7,9,13(22),14,16,18,20-decaene