2,10-diaza-2-(2,2-dimethylpropanoyl)-7-(ethoxycarbonyl)-13-oxa-9,11-dioxo-10-phenyltetracyclo[5.5.01,5.08,12]tridec-5(6)-en-6-yl-2,2-dimethyl propanoate 在
oxonium 作用下,
生成 1-(2,2-dimethylpropionyl)-4-(2,2-dimethylpropionyloxy)-6,8-dioxo-7-phenyl-1,2,3,6,7,8-hexahydro-1,7-diaza-as-indacene-5-carboxylic acid ethyl ester