3,3'-Di-tert-butyl-2'-((4,8-di-tert-butyl-2,10-dimethoxydibenzo[d,f][1,3,2]dioxaphosphepin-6-yl)oxy)-5,5'-dimethoxy-[1,1'-biphenyl]-2-ol

3,3'-Di-tert-butyl-2'-((4,8-di-tert-butyl-2,10-dimethoxydibenzo[d,f][1,3,2]dioxaphosphepin-6-yl)oxy)-5,5'-dimethoxy-[1,1'-biphenyl]-2-ol