3,7,10-trimethyl-(1H,3H,7H,10H)-pyrimido[5-4-g]pteridine-2,4,6,8-tetrone

二乙基2-苯基丁二酸酯

diethyl 2-butylsulfanylbutanedioate

2-methoxybutanedioic acid

3-氰基-1H-吡唑-4-羧酸乙酯