1225375-60-9
2-bromo-7-oxo-4,7-dihydropyrazolo[1,5-α]pyrimidine-6-carboxylic acid
→
~97%
1203705-57-0
2-溴吡唑并[1,5-a]嘧啶-7(4h)-酮
1203705-58-1
2-溴-7-氯吡唑并[1,5-a]嘧啶