dimethyl 4,5-dihydro-1H-pyrazole-3,4-dicarboxylate

dimethyl 2-(2-methyl-1,3-oxathiolan-2-yl)butanedioate

dimethyl 2-(2,2-dimethylhydrazinyl)butanedioate

替卡格雷中间体

Dimethyl N-(dibenzyloxycarbonylamino)aziridine-trans-2,3-dicarboxylate