1,3,5,7,9,10-hexahydro-3,7,10-trimethylpyrimido<5,4-g>pteridine-2,4,6,8-tetrone

外-3,6-环氧-1,2,3,6-四氢邻苯二甲酸酐

L-天冬酰胺

磺基琥珀酸

diethyl 2-azidobutanedioate