3,3-dimethyl-1-(3-phenylsulfanyloxolan-2-yl)butan-2-one

1-hydroxy-4,4-dimethyl-1,1-diphenyl-pentan-3-one

(3-tert-butyl-2,2-diphenyloxetan-3-yl)oxy-trimethylsilane

3-tert-butyl-2,2-diphenyloxetan-3-ol

3,3-dimethyl-1,1-diphenylbutan-2-one