4,6-di-tert-butyl-8-methoxydibenzofuran-1,2-quinone
4,6-di-tert-butyl-1,2,8-trimethoxy-dibenzofuran
2,2'-dihydroxy-3,3'-di-tert-butyl-5,5'-dimethoxy-1,1'-biphenyl
(Z)-3-(3'-hydroxy-2',2'-dimethoxy-5',5'-dimethyl-4'-oxohexylidene)-5-methoxy-7-t-butylbenzofuran-2(3H)-one