83824-38-8
1-methyl-4H-pyrazolo[4,3-d]pyrimidine-5,7-dione
→
~70%
939979-32-5
5,7-二氯-1-甲基-吡唑并[4,3-d]嘧啶
16034-46-1
1-甲基吡唑-5-甲酸
92534-72-0
2-methyl-4-nitropyrazole-3-carboxamide
530-62-1
N,N'-羰基二咪唑
92534-73-1
4-氨基-1-甲基-1H-吡唑-5-甲酰胺