METHYL 2,2-DIMETHYLACETOACETATE

1,4-DIHYDROXY-2,2-DIMETHYLPIPERAZINE

2,2-diphenylbutyric acid

2,2'-Dithiobis(benzothiazole)

2,2'-Dithiosalicylic acid

5,5'-Dihydroxy-2,2'-dinaphthylamine-7,7'-disulphonic acid

2,2'-Methylenebis(6-tert-butyl-4-methylphenol)

2,3,3,4,4,5,5-Heptafluoro-1-pentene