4,4,5,5-tetramethyldioxolan-3-one

2,2-Dihydro-4,4,5,5-tetramethyl-2,2,2-triphenyl-1,3,2-dioxaphospholane

2,2,2-tris(4-chlorophenyl)-4,4,5,5-tetramethyl-1,3,2l⁵-dioxaphospholane

2,2,2-tris(4-methoxyphenyl)-4,4,5,5-tetramethyl-1,3,2l⁵-dioxaphospholane

3,3,4,4-tetramethyl-1,2-dioxetane