2,2'-[butylidenebis[[2-(tert-butyl)-5-methyl-p-phenylene]oxy]]bis[5,5-dimethyl-1,3,2-dioxaphosphorinane]

2,2'-[Butylidenebis[[2-(1,1-dimethylethyl)-5-methyl-4,1-phenylene]oxy]]bis(5,5-dimethyl-1,3,2-dioxaphosphorinane)