7-(aminomethyl)-1,2,6-trimethylpyrazolo[1,2-a]pyrazole-3,5-dione

2,3,6,7-四甲基-1,5-二氮杂双环[3.3.0]-2,6-辛二烯-4,8-二酮

9,10-dioxa-syn-(ethyl,methyl)(methyl,methyl)bimane

1,7-diethyl-2,6-dimethylpyrazolo[1,2-a]pyrazole-3,5-dione