benzyl pyrazolidine-1-carboxylate

2-O-benzyl 1-O-tert-butyl diazepane-1,2-dicarboxylate

tert-butyl 2-(4-nitrobenzoyl)diazinane-1-carboxylate

tert-butyl diazepane-1-carboxylate

O1-苄基O2-叔-丁基4-亚甲基吡唑烷-1,2-二羧酸酯