1,2,4-三氮唑

1-methyl-1,2,4-triazolidine-3,5-dione

N,N',N'-triacetylacetohydrazide

4-甲基-5-甲氧基-1,2,4-三唑啉-3-酮

1,2-diacetyl-1,2,4-triazolidine-3,5-dione