6, 6'-(Ethylenebis(oxy))bis(1, 3, 5-triazine-2, 4-diamine)

6, 6'-(Vinylenebis((3-sulpho-p-phenylene)azo))bis(4-amino-5-hydroxynaphthalene-1, 3-disulphonic) acid, sodium salt

6, 6'-Azopurine

6, 6'-Bi(7-allyl-3-oxo-4-estren-17-yl acetate)

6, 6'-Bi-2-picoline

6, 6'-Bieckol

6, 6'-Binaphtho(2, 1-b)furan, 7, 7'-dimethoxy-2, 2'-dinitro-

6, 6'-Di-O-corynomycoloyl-alpha-mannopyranosyl-alpha-mannopyranoside

6, 6'-Di-O-corynomycolyl galactopyranosyl-galactopyranoside

6, 6'-Di-O-mycoloyl-alpha-mannopyranosyl-alpha-mannopyranoside

6, 6'-Di-tert-butyl-4, 4'-methylenedi-o-cresol

6, 6'-Dibromosucrose

6, 6'-Dichloro-4, 4'-dinitro-O, O'-biphenol

6, 6'-Dichloro-6, 6'-dideoxysucrose

6, 6'-Dicorynomycolyl trehalose

6, 6'-Dimethoxy-2, 2'-binaphthalenyl

6, 6'-Dimethoxy-2, 2'-dimethyl-9', 10', 11', 12', 13', 14'-hexadehydro-9', 10', 11', 12', 13', 14'-hexahydroberbaman-7, 12-diol

6, 6'-Dimethoxy-2, 2, 2', 2'-tetramethyl-8, 8'-bi-2H-1-benzopyran

6, 6'-Dimethyl(1, 1'-biphenyl)-3, 3', 4, 4'-tetraol

6, 6'-Dimethylundecane