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

富马酸二乙酯

5a-(2,5-dioxopyrrolidin-3-yl)-3,7,10-trimethyl-5,5a-dihydropyrimido[5,4-g]pteridine-2,4,6,8(1H,3H,7H,10H)-tetraone

5a-(2,5-dioxopyrrolidin-3-yl)-3,7,10-trimethyl-2,4,6,8-tetraoxo-3,4,5,5a,6,7,8,10-octahydro-2H-pyrimido[5,4-g]pteridin-1-ide

1,5a-bis(2,5-dioxopyrrolidin-3-yl)-3,7,10-trimethyl-5,5a-dihydropyrimido[5,4-g]pteridine-2,4,6,8(1H,3H,7H,10H)-tetraone