5,8-二氢-1H-蝶啶-2,4,6,7-四酮

2,5-dihexyl-3,6-dihydroxycyclohexa-2,5-diene-1,4-dione

diethyl 2-oxo-3-propylbutanedioate

N,N'-bis[3-(dimethylamino)propyl]oxamide

草酸二丁酯