3-[tert-butyl(dimethyl)silyl]oxy-2,2-diphenylcyclobutan-1-one

4-benzhydrylidene-3,3-diphenyloxetan-2-one

2-benzhydrylidene-4-phenyl-1,3-dioxolane

3,3,4-triphenyldihydrofuran-2(3H)-one

去甲基草乃敌