3-ethyl-3,5,5-trimethylheptan-4-one

2,2,5,5-tetramethyl-1-phenylhexan-1-one

N-BOC-N-IM-1-甲基-L-组氨酸

9-benzyl-9-methylfluorene

1-methyl-2-methylsulfonylbenzimidazole